OpenStax, Introductory Statistics 2e §13.4 Test of Two Variances · Exercise 13 · Statistics · ANOVA

Test of Two Variances · Exercise 13

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?

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OpenStax, Introductory Statistics 2e · §13.4 Test of Two Variances · Exercise 13

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