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You are the manager of a restaurant for a fast-food franchise.
1. You are the manager of a restaurant for a fast-food franchise. Last month, the mean waiting time at the drive-through window for branches in your geographical region, as measured from the time a customer places an order until the time the customer receives the order, was 3.8 minutes. You select a random sample of 64 orders. The sample mean waiting time is 3.54 minutes, with a sample standard deviation of 0.8 minute. Complete parts (a) and (b) below.