Carver Memorial Hospital's surgeons have a new procedure that they think will decrease the variance in the time it takes to perform an appendectomy. A sample of 8 appendectomies using the old method had a variance of 36 minutes, while a sample of 10 appendectomies using the experimental method had a variance of 16 minutes. At α = .10 in a two-tailed test for equal variances, the critical values are:
A)0.272 and 3.29
B)0.299 and 3.07
C)0.368 and 2.51
D)-1.645 and +1.645

Question

Quizplus · Accepted Answer

The critical values for a two-tailed test for equal variances at α = .10 are 0.272 and 3.29, which correspond to the F-distribution critical values for the given degrees of freedom associated with the sample sizes and the specified alpha level.

Carver Memorial Hospital's Surgeons Have a New Procedure That They