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The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Introduction to R – a computing software forstatistical analysis
Krzysztof PodgorskiDepartment of Mathematics and Statistics
University of Limerick
September 8, 2009
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Quotation of the lecture
“I was still a couple of miles above the clouds when it broke,and with such violence I fell to the ground that I found myselfstunned, and in a hole nine fathoms under the grass, when Irecovered, hardly knowing how to get out again. Looking down,I observed that I had on a pair of boots with exceptionallysturdy straps. Grasping them firmly, I pulled with all my might.Soon I had hoist myself to the top and stepped out on terrafirma without further ado.”
R. E. Raspe, Singular Travels, Campaigns and Adventures ofBaron Munchausen, 1786.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Outline
1 The R Project for Statistical Computing
2 Statistical Tables using R
3 Monte Carlo method
4 Resampling from data
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Downloading and installing the R-package
can be downloaded from the following webside:http://www.r-project.org/index.html
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:
WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:Windows
Mac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10
Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The highlights
The package is available for all popular operating systems:WindowsMac OS 10Linux
It is free!
Everyone (knowledgeable enough) can contribute to the software bywriting a package
Packages are available for download through a convienient facility
It is fairly well documented and the documentation is available eitherfrom the program help menu or from the website
It is the top choice of statistical software among academic statisticiansbut also very popular in industry specially among biostatisticians andmedical researchers (mostly due to the huge package calledBioconductor that is built on the top of R)
It is a powerful tool not only for doing statistics but also all kind ofscientific programming
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implemented
linear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,
classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,
time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,
classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,
clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,
...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includes
an effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,
a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,
a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,
graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, and
a well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
What is R? – only some basic information
R is a language and environment for statistical computing and graphics.
R provides a wide variety of statistical and graphical techniques, and is highly extensible. Among its tools
one can find implementedlinear and nonlinear modelling,classical statistical tests,time-series analysis,classification,clustering,...
One of R’s strengths is the ease with which well-designed publication-quality plots can be produced,including mathematical symbols and formulae where needed.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It
includesan effective data handling and storage facility,a suite of operators for calculations on arrays, in particular matrices,a large, coherent, integrated collection of intermediate tools for data analysis,graphical facilities for data analysis and display either on-screen or on hardcopy, anda well-developed, simple and effective programming language which includes conditionals, loops,user-defined recursive functions and input and output facilities.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Outline
1 The R Project for Statistical Computing
2 Statistical Tables using R
3 Monte Carlo method
4 Resampling from data
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Table a normal distribution
The following is a fragment of the table of values of F (x) for thestandard normal cumulative distribution function
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The same “table” in RHere is a simple code in R that produce the same values as in the table
#Preceding line with the symbol ’#’ makes it a comment in R#The following line produce a single value of the standard normal cumulative#function. It is the value corresponding to the first value in the table
pnorm(-3.4)
#[1] 0.0003369293
#Then the first row of the table
z=seq(-3.4,-3.31,by=0.01)pnorm(z)
# [1] 0.0003369293 0.0003494631 0.0003624291 0.0003758409 0.0003897124# [6] 0.0004040578 0.0004188919 0.0004342299 0.0004500872 0.0004664799
#And all values from the table
z=seq(-3.4,3.4,by=0.01)pnorm(z)
[1] 0.0003369293 0.0003494631 0.0003624291 0.0003758409 0.0003897124 0.0004040578 0.0004188919 0.0004342299 0.0004500872 0.0004664799[11] 0.0004834241 0.0005009369 0.0005190354 0.0005377374 0.0005570611 0.0005770250 0.0005976485 0.0006189511 0.0006409530 0.0006636749[21] 0.0006871379 0.0007113640 0.0007363753 0.0007621947 0.0007888457 0.0008163523 0.0008447392 0.0008740315 0.0009042552 0.0009354367[31] 0.0009676032 0.0010007825 0.0010350030 0.0010702939 0.0011066850 0.0011442068 0.0011828907 0.0012227687 0.0012638734 0.0013062384[41] 0.0013498980 0.0013948872 0.0014412419 0.0014889987 0.0015381952 0.0015888696 0.0016410612 0.0016948100 0.0017501569 0.0018071438[51] 0.0018658133 0.0019262091 0.0019883759 0.0020523590 0.0021182050 0.0021859615 0.0022556767 0.0023274002 0.0024011825 0.0024770750[61] 0.0025551303 0.0026354021 0.0027179449 0.0028028146 0.0028900681 0.0029797632 0.0030719592 0.0031667163 0.0032640958 0.0033641604[71] 0.0034669738 0.0035726010 0.0036811080 0.0037925623 0.0039070326 0.0040245885 0.0041453014 0.0042692434 0.0043964883 0.0045271111[81] 0.0046611880 0.0047987966 0.0049400158 0.0050849257 0.0052336082 0.0053861460 0.0055426234 0.0057031263 0.0058677417 0.0060365581[91] 0.0062096653 0.0063871548 0.0065691191 0.0067556526 0.0069468508 0.0071428107 0.0073436310 0.0075494114 0.0077602536 0.0079762603
[101] 0.0081975359 0.0084241864 0.0086563190 0.0088940426 0.0091374675 0.0093867055 0.0096418699 0.0099030756 0.0101704387 0.0104440771[111] 0.0107241100 0.0110106583 0.0113038442 0.0116037915 0.0119106254 0.0122244727 0.0125454614 0.0128737214 0.0132093838 0.0135525811[121] 0.0139034475 0.0142621184 0.0146287308 0.0150034230 0.0153863348 0.0157776074 0.0161773834 0.0165858067 0.0170030226 0.0174291779[131] 0.0178644206 0.0183088999 0.0187627664 0.0192261722 0.0196992704 0.0201822154 0.0206751629 0.0211782696 0.0216916938 0.0222155944[141] 0.0227501319 0.0232954678 0.0238517643 0.0244191853 0.0249978951 0.0255880595 0.0261898449 0.0268034189 0.0274289497 0.0280666067[151] 0.0287165598 0.0293789800 0.0300540390 0.0307419089 0.0314427630 0.0321567748 0.0328841187 0.0336249694 0.0343795024 0.0351478936[161] 0.0359303191 0.0367269557 0.0375379803 0.0383635704 0.0392039033 0.0400591569 0.0409295090 0.0418151376 0.0427162208 0.0436329365[171] 0.0445654628 0.0455139773 0.0464786579 0.0474596818 0.0484572263 0.0494714680 0.0505025835 0.0515507485 0.0526161385 0.0536989281[181] 0.0547992917 0.0559174025 0.0570534332 0.0582075556 0.0593799406 0.0605707580 0.0617801767 0.0630083645 0.0642554878 0.0655217121[191] 0.0668072013 0.0681121180 0.0694366233 0.0707808770 0.0721450370 0.0735292596 0.0749336995 0.0763585095 0.0778038405 0.0792698415[201] 0.0807566592 0.0822644387 0.0837933224 0.0853434508 0.0869149619 0.0885079914 0.0901226725 0.0917591357 0.0934175090 0.0950979178[211] 0.0968004846 0.0985253290 0.1002725680 0.1020423151 0.1038346811 0.1056497737 0.1074876971 0.1093485524 0.1112324374 0.1131394464[221] 0.1150696702 0.1170231960 0.1190001075 0.1210004844 0.1230244031 0.1250719356 0.1271431506 0.1292381122 0.1313568810 0.1334995132[231] 0.1356660609 0.1378565720 0.1400710901 0.1423096544 0.1445722997 0.1468590564 0.1491699503 0.1515050028 0.1538642304 0.1562476450[241] 0.1586552539 0.1610870595 0.1635430593 0.1660232461 0.1685276075 0.1710561263 0.1736087803 0.1761855422 0.1787863796 0.1814112549[251] 0.1840601253 0.1867329430 0.1894296548 0.1921502021 0.1948945213 0.1976625431 0.2004541933 0.2032693918 0.2061080536 0.2089700879[261] 0.2118553986 0.2147638842 0.2176954376 0.2206499463 0.2236272924 0.2266273524 0.2296499972 0.2326950923 0.2357624978 0.2388520681[271] 0.2419636522 0.2450970937 0.2482522305 0.2514288951 0.2546269147 0.2578461108 0.2610862997 0.2643472921 0.2676288935 0.2709309038[281] 0.2742531178 0.2775953248 0.2809573089 0.2843388490 0.2877397188 0.2911596868 0.2945985162 0.2980559654 0.3015317875 0.3050257309[291] 0.3085375387 0.3120669494 0.3156136965 0.3191775088 0.3227581103 0.3263552203 0.3299685537 0.3335978206 0.3372427268 0.3409029738[301] 0.3445782584 0.3482682735 0.3519727076 0.3556912452 0.3594235668 0.3631693488 0.3669282640 0.3706999811 0.3744841653 0.3782804782[311] 0.3820885778 0.3859081188 0.3897387524 0.3935801268 0.3974318868 0.4012936743 0.4051651283 0.4090458849 0.4129355774 0.4168338365[321] 0.4207402906 0.4246545653 0.4285762841 0.4325050683 0.4364405371 0.4403823076 0.4443299952 0.4482832133 0.4522415740 0.4562046875[331] 0.4601721627 0.4641436074 0.4681186280 0.4720968298 0.4760778173 0.4800611942 0.4840465631 0.4880335266 0.4920216863 0.4960106437[341] 0.5000000000 0.5039893563 0.5079783137 0.5119664734 0.5159534369 0.5199388058 0.5239221827 0.5279031702 0.5318813720 0.5358563926[351] 0.5398278373 0.5437953125 0.5477584260 0.5517167867 0.5556700048 0.5596176924 0.5635594629 0.5674949317 0.5714237159 0.5753454347[361] 0.5792597094 0.5831661635 0.5870644226 0.5909541151 0.5948348717 0.5987063257 0.6025681132 0.6064198732 0.6102612476 0.6140918812[371] 0.6179114222 0.6217195218 0.6255158347 0.6293000189 0.6330717360 0.6368306512 0.6405764332 0.6443087548 0.6480272924 0.6517317265[381] 0.6554217416 0.6590970262 0.6627572732 0.6664021794 0.6700314463 0.6736447797 0.6772418897 0.6808224912 0.6843863035 0.6879330506[391] 0.6914624613 0.6949742691 0.6984682125 0.7019440346 0.7054014838 0.7088403132 0.7122602812 0.7156611510 0.7190426911 0.7224046752[401] 0.7257468822 0.7290690962 0.7323711065 0.7356527079 0.7389137003 0.7421538892 0.7453730853 0.7485711049 0.7517477695 0.7549029063[411] 0.7580363478 0.7611479319 0.7642375022 0.7673049077 0.7703500028 0.7733726476 0.7763727076 0.7793500537 0.7823045624 0.7852361158[421] 0.7881446014 0.7910299121 0.7938919464 0.7967306082 0.7995458067 0.8023374569 0.8051054787 0.8078497979 0.8105703452 0.8132670570[431] 0.8159398747 0.8185887451 0.8212136204 0.8238144578 0.8263912197 0.8289438737 0.8314723925 0.8339767539 0.8364569407 0.8389129405[441] 0.8413447461 0.8437523550 0.8461357696 0.8484949972 0.8508300497 0.8531409436 0.8554277003 0.8576903456 0.8599289099 0.8621434280[451] 0.8643339391 0.8665004868 0.8686431190 0.8707618878 0.8728568494 0.8749280644 0.8769755969 0.8789995156 0.8809998925 0.8829768040[461] 0.8849303298 0.8868605536 0.8887675626 0.8906514476 0.8925123029 0.8943502263 0.8961653189 0.8979576849 0.8997274320 0.9014746710[471] 0.9031995154 0.9049020822 0.9065824910 0.9082408643 0.9098773275 0.9114920086 0.9130850381 0.9146565492 0.9162066776 0.9177355613[481] 0.9192433408 0.9207301585 0.9221961595 0.9236414905 0.9250663005 0.9264707404 0.9278549630 0.9292191230 0.9305633767 0.9318878820[491] 0.9331927987 0.9344782879 0.9357445122 0.9369916355 0.9382198233 0.9394292420 0.9406200594 0.9417924444 0.9429465668 0.9440825975[501] 0.9452007083 0.9463010719 0.9473838615 0.9484492515 0.9494974165 0.9505285320 0.9515427737 0.9525403182 0.9535213421 0.9544860227[511] 0.9554345372 0.9563670635 0.9572837792 0.9581848624 0.9590704910 0.9599408431 0.9607960967 0.9616364296 0.9624620197 0.9632730443[521] 0.9640696809 0.9648521064 0.9656204976 0.9663750306 0.9671158813 0.9678432252 0.9685572370 0.9692580911 0.9699459610 0.9706210200[531] 0.9712834402 0.9719333933 0.9725710503 0.9731965811 0.9738101551 0.9744119405 0.9750021049 0.9755808147 0.9761482357 0.9767045322[541] 0.9772498681 0.9777844056 0.9783083062 0.9788217304 0.9793248371 0.9798177846 0.9803007296 0.9807738278 0.9812372336 0.9816911001[551] 0.9821355794 0.9825708221 0.9829969774 0.9834141933 0.9838226166 0.9842223926 0.9846136652 0.9849965770 0.9853712692 0.9857378816[561] 0.9860965525 0.9864474189 0.9867906162 0.9871262786 0.9874545386 0.9877755273 0.9880893746 0.9883962085 0.9886961558 0.9889893417[571] 0.9892758900 0.9895559229 0.9898295613 0.9900969244 0.9903581301 0.9906132945 0.9908625325 0.9911059574 0.9913436810 0.9915758136[581] 0.9918024641 0.9920237397 0.9922397464 0.9924505886 0.9926563690 0.9928571893 0.9930531492 0.9932443474 0.9934308809 0.9936128452[591] 0.9937903347 0.9939634419 0.9941322583 0.9942968737 0.9944573766 0.9946138540 0.9947663918 0.9949150743 0.9950599842 0.9952012034[601] 0.9953388120 0.9954728889 0.9956035117 0.9957307566 0.9958546986 0.9959754115 0.9960929674 0.9962074377 0.9963188920 0.9964273990[611] 0.9965330262 0.9966358396 0.9967359042 0.9968332837 0.9969280408 0.9970202368 0.9971099319 0.9971971854 0.9972820551 0.9973645979[621] 0.9974448697 0.9975229250 0.9975988175 0.9976725998 0.9977443233 0.9978140385 0.9978817950 0.9979476410 0.9980116241 0.9980737909[631] 0.9981341867 0.9981928562 0.9982498431 0.9983051900 0.9983589388 0.9984111304 0.9984618048 0.9985110013 0.9985587581 0.9986051128[641] 0.9986501020 0.9986937616 0.9987361266 0.9987772313 0.9988171093 0.9988557932 0.9988933150 0.9989297061 0.9989649970 0.9989992175[651] 0.9990323968 0.9990645633 0.9990957448 0.9991259685 0.9991552608 0.9991836477 0.9992111543 0.9992378053 0.9992636247 0.9992886360[661] 0.9993128621 0.9993363251 0.9993590470 0.9993810489 0.9994023515 0.9994229750 0.9994429389 0.9994622626 0.9994809646 0.9994990631[671] 0.9995165759 0.9995335201 0.9995499128 0.9995657701 0.9995811081 0.9995959422 0.9996102876 0.9996241591 0.9996375709 0.9996505369[681] 0.9996630707
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
There is more than meets the eye in the table
It is not only the table values that can be explored for thestandard normal distribution using R. Recall that the normaldistribution equally often referred to as a Gaussian distribution,is defined by the density
f (z) =1√2π
e−z2/2.
The density represents distribution of probability for arandom variable associated with it.The area under the density represents the probability sothe that the total area under it is equal to one.The area accumulated up to certain value z representsprobability that a corresponding random variable takesvalue smaller than z and this probability defines thecumulative distribution function F (z) which is tabularized.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
There is more than meets the eye in the table
It is not only the table values that can be explored for thestandard normal distribution using R. Recall that the normaldistribution equally often referred to as a Gaussian distribution,is defined by the density
f (z) =1√2π
e−z2/2.
The density represents distribution of probability for arandom variable associated with it.The area under the density represents the probability sothe that the total area under it is equal to one.The area accumulated up to certain value z representsprobability that a corresponding random variable takesvalue smaller than z and this probability defines thecumulative distribution function F (z) which is tabularized.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
There is more than meets the eye in the table
It is not only the table values that can be explored for thestandard normal distribution using R. Recall that the normaldistribution equally often referred to as a Gaussian distribution,is defined by the density
f (z) =1√2π
e−z2/2.
The density represents distribution of probability for arandom variable associated with it.
The area under the density represents the probability sothe that the total area under it is equal to one.The area accumulated up to certain value z representsprobability that a corresponding random variable takesvalue smaller than z and this probability defines thecumulative distribution function F (z) which is tabularized.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
There is more than meets the eye in the table
It is not only the table values that can be explored for thestandard normal distribution using R. Recall that the normaldistribution equally often referred to as a Gaussian distribution,is defined by the density
f (z) =1√2π
e−z2/2.
The density represents distribution of probability for arandom variable associated with it.The area under the density represents the probability sothe that the total area under it is equal to one.
The area accumulated up to certain value z representsprobability that a corresponding random variable takesvalue smaller than z and this probability defines thecumulative distribution function F (z) which is tabularized.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
There is more than meets the eye in the table
It is not only the table values that can be explored for thestandard normal distribution using R. Recall that the normaldistribution equally often referred to as a Gaussian distribution,is defined by the density
f (z) =1√2π
e−z2/2.
The density represents distribution of probability for arandom variable associated with it.The area under the density represents the probability sothe that the total area under it is equal to one.The area accumulated up to certain value z representsprobability that a corresponding random variable takesvalue smaller than z and this probability defines thecumulative distribution function F (z) which is tabularized.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
All this can be seen in RThe following code explores various aspects of the standard normal distribution
#Plotting the density function of the standard normal variable
z=seq(-3,3,by=0.01)plot(z,dnorm(z),type=’l’,col="red",lwd=4)
#Plotting the cumulative distribution function (that one from the table)
plot(z,pnorm(z),type=’l’,col="red",lwd=4)
#And plotting them one at the top of the other
par(mfrow=c(2, 1))
plot(z,dnorm(z),type=’l’,col="red",lwd=4)
plot(z,pnorm(z),type=’l’,col="red",lwd=4)
#Side by side
par(mfrow=c(1, 2))
plot(z,dnorm(z),type=’l’,col="red",lwd=4)
plot(z,pnorm(z),type=’l’,col="red",lwd=4)
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Outline
1 The R Project for Statistical Computing
2 Statistical Tables using R
3 Monte Carlo method
4 Resampling from data
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Deciding for Poisson model
Recall that the Poisson model is given by
P(X = x |θ) =θxe−θ
x!.
It is relatively easy to demonstrate that the mean value of thisdistribution is equal to θ and standard deviation is also equal to θ.
How?Thus for a sample of observations x = (x1, . . . , xn) it is reasonable toconsider both
θ1 = x,
θ2 = x2 − x2
as estimators of θ.Important Question
Which one is better?
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Deciding for Poisson model
Recall that the Poisson model is given by
P(X = x |θ) =θxe−θ
x!.
It is relatively easy to demonstrate that the mean value of thisdistribution is equal to θ and standard deviation is also equal to θ.How?
Thus for a sample of observations x = (x1, . . . , xn) it is reasonable toconsider both
θ1 = x,
θ2 = x2 − x2
as estimators of θ.Important Question
Which one is better?
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Deciding for Poisson model
Recall that the Poisson model is given by
P(X = x |θ) =θxe−θ
x!.
It is relatively easy to demonstrate that the mean value of thisdistribution is equal to θ and standard deviation is also equal to θ.How?Thus for a sample of observations x = (x1, . . . , xn) it is reasonable toconsider both
θ1 = x,
θ2 = x2 − x2
as estimators of θ.
Important Question
Which one is better?
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Deciding for Poisson model
Recall that the Poisson model is given by
P(X = x |θ) =θxe−θ
x!.
It is relatively easy to demonstrate that the mean value of thisdistribution is equal to θ and standard deviation is also equal to θ.How?Thus for a sample of observations x = (x1, . . . , xn) it is reasonable toconsider both
θ1 = x,
θ2 = x2 − x2
as estimators of θ.Important Question
Which one is better?
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Monte Carlo study
Computational approach to the problem is to run many samples from thePoisson distribution and check which of the estimates performs better. This iswhat is done in the following R code:
%Generating in a loop samples of size n=20 from Poisson distribution with parameter theta=4%and evaluating theis means and standard deviationsn=20theta=4N=1000means=vector(’numeric’,N)vars=vector(’numeric’,N)for(i in 1:N){x=rpois(n,theta)means[i]=mean(x)vars[i]=var(x)
}
%Plotting histogramssplit.screen(c(2,1),1)hist(means)hist(vars)
It is quite clear from the graphs that the estimator based on the mean isbetter than the one based on the variance.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Monte Carlo study
Computational approach to the problem is to run many samples from thePoisson distribution and check which of the estimates performs better. This iswhat is done in the following R code:
%Generating in a loop samples of size n=20 from Poisson distribution with parameter theta=4%and evaluating theis means and standard deviationsn=20theta=4N=1000means=vector(’numeric’,N)vars=vector(’numeric’,N)for(i in 1:N){x=rpois(n,theta)means[i]=mean(x)vars[i]=var(x)
}
%Plotting histogramssplit.screen(c(2,1),1)hist(means)hist(vars)
It is quite clear from the graphs that the estimator based on the mean isbetter than the one based on the variance.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Outline
1 The R Project for Statistical Computing
2 Statistical Tables using R
3 Monte Carlo method
4 Resampling from data
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Nitrate ion concentration measurements in a certainchemical lab
Also in the file Table2_1.txt
0.51 0.51 0.51 0.50 0.51 0.49 0.52 0.53 0.50 0.470.51 0.52 0.53 0.48 0.49 0.50 0.52 0.49 0.49 0.500.49 0.48 0.46 0.49 0.49 0.48 0.49 0.49 0.51 0.470.51 0.51 0.51 0.48 0.50 0.47 0.50 0.51 0.49 0.480.51 0.50 0.50 0.53 0.52 0.52 0.50 0.50 0.51 0.51
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
The mean concentration
#Getting data in a vectorx=scan(’Table2_1.txt’)
mean(x)#[1] 0.4998
sd(x)#[1] 0.01647385
QuestionWhat is the error of this determination of the nitrate concentration?
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Pulling yourselves up by bootstraps, i.e. something fornothing
If we would repeat our experiment of collecting 50 samples ofnitrate concentrations many times we would see the range oferror.
But it would be a waste of resources and not a viable method.
Instead we resample ‘new’ data from our data and use soobtained new samples for assessment of the error.
The following R code does the job.#Getting data in a vectorm=mean(x)bootstrap=vector(’numeric’,500)for(i in 1:500){bootstrap[i]=mean(sample(x,replace=T))-mean(x)}
#The distribution of estimation errorhist(boostrap)
We can safely say that the nitrate concentration is 49.99± 0.005.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Gaussian distribution or is it?
Abraham de Moivre French mathematician residing in England, anarticle in 1733 proved that coins count will follow Normal law,
Anecdote: He noted shortly before his death that it was necessary orhim to sleep a quarter of hour longer each day, he computed that the
day he will have to sleep 24 hours was on 27 November 1754. Hedeclared this date to be the day of his death and indeed he died on this
day.
Pierre-Simon, marquis de Laplace a great French mathematician andphysicist (when Gauss was two years old), an article in 1778.
Anecdote: His brain was removed by his physician and kept for manyyears, it was reportedly smaller than the average brain.
Carl Friedrich Gauss a great German mathematician and physicist, anarticle in 1809.
Anecdote: While his wife was lying sick, Gauss became engrossed in atheoretical problem. When the doctor told him that his wife was dying,
Gauss wave him away, Tell her, he ordered without looking up, to wait aminute until I’ve finished.
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Stigler’s law of eponymy (Stephen Stigler, statisticsprofessor, University of Chicago)
No scientific discovery is named after its originaldiscoverer.
attributed to Robert K. Merton
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Stigler’s law of eponymy (Stephen Stigler, statisticsprofessor, University of Chicago)
No scientific discovery is named after its originaldiscoverer.
attributed to Robert K. Merton
The R Project for Statistical Computing Statistical Tables using R Monte Carlo method Resampling from data
Stigler’s law of eponymy (Stephen Stigler, statisticsprofessor, University of Chicago)
No scientific discovery is named after its originaldiscoverer.
attributed to Robert K. Merton