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Chapter 2: Q R2.9. (page 148)

Assessing Normality Catherine and Ana gave an online reflex test to33 varsity

athletes at their school. The following Normal probability plot displays the data on reaction times (in milliseconds) for these students. Is the distribution of reaction times for these athletes approximately Normal? Why or why not?

Short Answer

Expert verified

Not approximately normal.

Step by step solution

01

Given information

The figure is:

02

Explanation

Around a reaction time of 200ms, there is a considerable curvature in the normal probability lot, indicating that the pattern in the Normal probability plot is not substantially linear. This suggests, however, that the distribution is not approximately normal. Because the pattern is concave up on the left side of the normal probability plot, the distribution seems to be slightly skewed to the right.

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Two measures of center are marked on the density curve shown. Which of the following is correct?

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