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3C 3 day 45 Display Data ANS day 4.notebook
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October 23, 2017
displaying data
Learning Goals:Making various graphs by hand
There are 3 types of data.
Categorical Data- Qualitative- recorded as label
ex. male / femaleeye colour
Continuous Data- Quantitative- decimals are allowed
ex. measurements 14.7 cm
Handout
3C 3 day 45 Display Data ANS day 4.notebook
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Discrete Data- Quantitative- decimals are NOT allowed
ex. number of toppings on a pizzanumber of people attending
Examples
1. Number of mugs of coffee drank in a day.
2. Amount of coffee drank in a day (in mL).
3. Type of pet at home.
4. Number of pets at home.
Depending on the data type we use
different graphs to show the data.
Step 1: Collect some information
(e.g. using a frequency table)
Category (e.g. Age) Tally Frequency
[ 0 2 )[ 2 4 )[ 4 6 )
***[square bracket] = value is included
(round bracket) = value not included
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Step 2: Graph the information
Types of graphs:
a) bar graph (spaces between bars)*** good for showing differences between categories
...more bar graphs...
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...more bar graphs...
...more bar graphs...
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...more bar graphs...
b) histogram (no space between bars)
*** also good for showing differences between categories
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...more histograms...
c) line graph*** good for showing changes over time
brokenline graph
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...more line graphs...
...more line graphs...
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d) circle graph
*** good for showing parts (percentages of a total)
Popularity
...more circle graphs...
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...more circle graphs...
Graphs should always include the following!!!...
Y axis label
(dependant)
Xaxis label(independant)
Also,
use a pencil (NO pen!)
use a ruler
use graph paper
use appropriate scales
Title
3C 3 day 45 Display Data ANS day 4.notebook
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Histograms no gaps
11.5, 13.2, 3, 16, 24, 6, 0, 28, 13.8, 7, 16.6, 2, 24, 12, 18, 18, 9, 13.9, 12, 18.5, 4.5, 19, 14.9, 7.1, 21, 12
Find Range
Highest - Lowest
Determine the number of intervals (5-20)
range ÷ # of intervals
Don't overlap intervals
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Frequency
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addıtıonal practıce:
pg. 125 # 1, 2, 5, 12 (cırcle graph)
