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Chapter 11: Q 24. (page 718)

Do students who read more books for pleasure tend to earn higher grades in English? The boxplots show data from a simple random sample of 79 students at a large high school. Students were classified as light readers if they read fewer than 3 books for pleasure per year. Otherwise, they were classified as heavy readers. Each student’s average English grade for the previous two

marking periods was converted to a GPA scale, where A=4.0,A−=3.7,B+=3.3

and so on.

Short Answer

Expert verified

The distributions of both types seem to be approximately symmetric.

Step by step solution

01

Given information

02

Calculation

Because the median for the Light data set sits more to the left, the box plot of Light readers seems to have a lower center than that of Heavy readers.

Because the distance between the whiskers of the boxplot is bigger for the Light data set, the spread of Light readers is greater than that of Heavy readers. Both sorts of distributions appear to be roughly symmetric.

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