Using the experimental method had a mean of 29 minutes with, Ask an Expert

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Use the following scenario to answer questions 7 to 9.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. Use α = .10 for all tests.For a right-tail test of means (assume equal variances) the critical value is

1.746
1.337
2.120
2.754

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