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Carver Memorial Hospital

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
2.12
2.754

8. For the means, the test statistic (assuming equal variances) is:
3.814
2.365
3.000
1.895

9. To test for equal variances, the critical values are:
3.73 and 0.228
2.51 and 3.67
3.07 and 0.398
3.29 and 0.272

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Carver Memorial Hospital's surgeons have a new procedure that they think will decrease the time to perform an appendectomy
Carver Memorial Hospital's surgeons have a new procedure that they think will decrease the time to perform an ...

Solution Summary

The solution provides a step by step method for the calculation of critical values for hypothesis testing problems.

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