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The macburger restaurant chain claims that customers mean waiting time is 3 minutes. The quality assurance department found in a sample of 50 customers at the warren road macburger that the mean waiting time was 3.25 minutes. Assume the population standard deviation is 1 minute.

A. Construct a 95% confidence interval for the average waiting time for customer.

B. Based on the confidence interval you construct in part a, do you think the macburger 's claim is reasonable?

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