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    Carver Memorial Hospital

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    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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    https://brainmass.com/statistics/hypothesis-testing/carver-memorial-hospital-224588

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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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