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A professor would like to test the hypothesis that the average number of minutes that a...

A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes. A random sample of 15 students was selected and the sample standard deviation for the time needed to complete the exam was found to be 4.0 minutes. Using α = 0.05, the critical value for this hypothesis test would be ________.

  1. a.

    6.571
    b.

    7.261
    c.

    23.685
    d.

    24.996
math   Statistics-And-Probability   
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