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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Charting Your Course

Charts are yet another efficient way to summarize and display patterns in a set of data, so let me demonstrate different types of charts that help us “tell it like it is.”

What’s Your Favorite Pie Chart?

Pie charts are commonly used to describe data from relative frequency distributions. This type of chart is simply a circle divided into portions whose area is equal to the relative frequency distribution. To illustrate the use of pie charts, let’s say some anonymous statistics professor submitted the following final grade distribution.
Final Statistics Grades
038
We can illustrate this relative frequency distribution by ...

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