Question: Given two normal populations A and B, we are interested in finding if the population variances of the two populations are equal. We are given the following information.

Sample from population A Sample from population B

Mean = 240 hours Mean = 200 hours

Sample standard deviation = 20 hours Sample standard deviation = 30 hours

Sample size = 21 Sample size = 26

Determine if the two population variances are equal or not by using a two-tailed hypothesis test with a level of significance = 0.05.