Chapter 13, Problem 55P

Use the following information to answer the next four exercises. Two students are interested in whether or not there is

variation in their test scores for math class. There are 15 total math tests they have taken so far. The first student’s grades

have a standard deviation of 38.1. The second student’s grades have a standard deviation of 22.5. The second student thinks

his scores are more consistent.

At the 5% significance level, do we reject the null hypothesis?