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

question 19

Multiple Choice

Carver Memorial Hospital's surgeons have a new procedure that they think will decrease the time to perform an appendectomy. A sample of 8 appendectomies using the old method had a mean of 38 minutes with a variance of 36 minutes, while a sample of 10 appendectomies using the experimental method had a mean of 29 minutes with a variance of 16 minutes. For a right-tailed test for equal means (assume equal variances) , the critical value at α = .10 is:

• A)1.746
• B)1.337
• C)2.120
• D)2.754

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