An investigator at a large midwestern university wants to determine the typical weekly amount of time students work on part-time jobs. More particularly, he wants to test the null hypothesis that the mean time is 15 hours versus a two-sided alternative. A sample of 39 students who hold part-time jobs is summarized by the computer output

(a) Perform the hypothesis test at the 1% level of significance.
(b) Calculate the significance probability and interpret the result.

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Descriptive Statistics: hours Variable N Mean Median StDev Hours 39 16.6915.00 7.61