We are interested in determining whether or not the variances of the sales at two music stores (A and B) are equal. A sample of 26 days of sales at store A has a sample standard deviation of 30 while a sample of 16 days of sales from store B has a sample standard deviation of 20.
At 95% confidence the null hypothesis
a. should not be rejected
b. should be rejected
c. should be revised
d. None of these alternatives is correct