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

question 72

Multiple Choice

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

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