Question

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. 0.368 and 2.51

b. −1.645 and +1.645

c. 0.272 and 3.29

d. 0.299 and 3.07

Answer 1

Answer : option C. 0.272 and 3.29

This test follows F-distribution.