Guide to Using Minitab 14 For Basic Statistical Applications To Accompany Business Statistics: A Decision Making Approach, 8th Ed. Chapter 2: Graphs, Charts

Guide to Using Minitab 14 For Basic Statistical Applications

Guide to Using Minitab 14 For Basic Statistical Applications

To Accompany

Business Statistics: A Decision Making Approach, 8th Ed.

Chapter 2:

Graphs, Charts and Tables - Describing Your Data

By

Groebner, Shannon, Fry, & SmithPrentice-Hall Publishing Company

Copyright, 2011

Chapter 2 Minitab Examples

Frequency Distributions -Athletic Shoe Survey

Histograms-Capital Credit Union

Joint Frequency Distributions-Capital Credit Union

Joint Relative Frequencies-Capital Credit Union

More Examples

Chapter 2 Minitab Examples (continued)Chapter 2 Minitab Examples (continued)

Bar Charts-

Bach, Lombard & Wilson Line Charts-

McGregor Vineyards Scatter Diagrams-

Personal Computers

Frequency Distributions Athletic Shoe SurveyFrequency Distributions Athletic Shoe Survey

Issue: Analyze the data from a survey of 100 college students regarding the number of Nike shoes they own.

Objective: Use Minitab to develop a frequency distribution for the number of Nike shoes owned by college students.

Data File is SportShoes.MTW

Frequency Distributions-Athletic Shoe Survey

Open the Minitab file called Sportshoes.MTW

The file contains 100 observations. Column C5 contains the Number of Nike Shoes owned


Select Stat then select Tables then Tally Individual Variables


Select “Number of Nike” variable – Display Counts – OK


Resulting Frequency Counts

HistogramsCapital Credit UnionHistogramsCapital Credit Union

Issue: Analyze credit card balances for Capital Credit Union customers using a frequency distribution and histogram.

Objective: Use Minitab to develop a frequency distribution and histogram for credit card balances. Use ten class intervals.

Data file is Capital.MTW


Open the Minitab file called Capital.MTW

File contains 300 observations - Column C2 contains the balances

Select Graph and Histogram


Click Simple - OK


Select variable to be graphed - OK


Completed Histogram


Joint Frequency Distributions Capital Credit UnionJoint Frequency Distributions Capital Credit Union

Issue: Analyze the credit card balances by gender of the card holder.

Objective: Use Minitab to develop a joint frequency distribution for the credit card balances by gender.

Data File is Capital.MTW


Open the Minitab file called Capital.MTW

File contains 300 observations - Column C2 contains the balances, Column C3 contains the gender code

First, organize the Credit balances into groups (see Example 2-5)

Select Data – Code – Numeric to Text



Identify variable to be Recoded – indicate where to store new variable

Click OK

Minitab only codes 8 classes at a time. Code the first 8 classes; then code the remaining classes

To create the joint frequency table, use Stat – Tables – Cross Tabulation and Chi-square


Click Column Percents - OK


Define variables to be uses (Classes and Gender)


Completed Joint Frequency Distribution

Bar ChartsBach, Lombard, & Wilson

Bar ChartsBach, Lombard, & Wilson

Issue: An electronics company is being sued on the grounds that female new hires are paid less than male new hires. The law firm needs to analyze salary data to prepare the case.

Objective: Use Minitab to develop bar charts for the starting salary data for males and females.

Data File is Bach.MTW

Bar Charts-Bach, Lombard & Wilson

Open the Minitab file called Bach.MTW


Must Rearrange the data. Select Data - Stack - Columns


Select Variables – Identify New Column Name – and Column for category labels - OK


Stack the Year variable - OK

Select Graph – Bar Chart

Bar Charts - Bach, Lombard & Wilson

Under Bars represent – Select Values from a table - OK


Select Cluster – Click OK


Define Variable to Graph and Categories - OK


Finished Bar Chart 1= Males, 2 = Females


Line Charts- McGregor VineyardsLine Charts- McGregor Vineyards

Issue: Analyze the sales and profits data over time.

Objective: Use Minitab to develop line charts for weekly sales and profits.

Data File is McGregor.MTW

Line Charts-McGregor Vineyards

Open the Minitab file called McGregor.MTW

File contains 20 weeks of historic data

Select Time Series Plot.

Click on Graph


Select Simple - OK


Define Variables to be Graphed – Select Multiple Graphs


Define Output Option – Click OK - OK


Finished Line Chart for the Sales and the Profit Variables.


Scatter Diagrams- Personal ComputersScatter Diagrams- Personal Computers

Issue: Analyze the relationship between PC sales price and the processing speed of the PC

Objective: Use Minitab to develop a scatter diagram for PC price and speed.

Data File is Computers.MTW

Scatter Diagrams- Personal Computers

Open the Minitab file called Computers.MTW

File contains data for 36 PC’s

Click on the Graph, select Scatter plot


Select Simple – Click OK


Define the Y and X variables Click OK


Completed Scatter Diagram


Documents

Guide to Using Minitab 14 For Basic Statistical Applications To Accompany Business Statistics: A Decision Making Approach, 8th Ed. Chapter 2: Graphs, Charts