Question: 3. [4] A study conducted by a commuter train transportation authority involved surveying a random sample of 200 passengers. The results show that a customer

3. [4] A study conducted by a commuter train transportation authority involved surveying a random sample of 200 passengers. The results show that a customer had to wait on the average 9.3 minutes with a standard deviation of 6.2 minutes to buy his or her ticket. Construct a 95% confidence interval for u, the true mean waiting time

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