(Answered) A random sample of 64 customers is selected to analyze

Economics

A random sample of 64 customers is selected to analyze their waiting time at a restaurant. The sample statistics are computed as follows: the sample mean xbar=3.21 minutes and the sample standard deviation s = 0.8 minutes. Test at the 5% significance level the alternate hypothesis that the average waiting time mu of all customers is longer than 3 minutes.

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