(a)
Which color was chosen by approximately oneeighth of the customers?
To know what a "oneeighth" slice looks like, we take a circle and cut it into eight equally sized pie slices. Each of the slices is oneeighth of the pie:


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Top of FormBottom of Form 

We want to find a category in the favorite color pie chart whose slice has approximately the same shape as the oneeighth slice shown above. If we look carefully at the graph, we find that it could only be the Grey category.
(b)
Approximately what percentage of the customers chose Grey or Pink?
Write your answer as a multiple of  that is, .
The categories Grey and Pink combined take up a little less than of the pie. Because , we know that the categories Grey and Pink must have been chosen by a little less than of the customers. Because the answer must be a multiple of , the correct answer is .
(c)
If of the customers chose Blue, approximately what percentage chose Other?
Note that the Other pie slice is approximately onethird the size of the Blue pie slice. So if the Blue slice represents of the customers, then the Other slice must represent approximately of the customers.
The answer is:




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Histograms for grouped dataHere are the shopping times (in minutes) for a sample of shoppers at a particular clothing store: 
Draw the histogram for these data using an initial class boundary of , an ending class boundary of , and classes of equal width. Note that you can add or remove classes from the figure. Label each class with its endpoints. 


 Click on the following for more information:
"Frequency polygon" and"Descriptive statistics". 



Additional Resources 
Elementary Statistics (A Brief Version), 6th Ed.
BlumanChapter 2: Frequency Distributions and GraphsSection 2.2:...