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A random sample of 15 hourly fees for car washers (including tips) was drawn from a normal population. The sample mean and sample standard deviation

A random sample of 15 hourly fees for car washers (including tips) was drawn from a normal population. The sample mean and sample standard deviation were sample mean is$14.9 and sample standard deviation is$6.75.We want to infer at the 5% significance level that the mean fee for car washers (including tips) is greater than 12.What is the rejection region to test the hypothesis?

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