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A bank manager wants to learn more about the time a customer has to wait to be served. He measures waiting time for a sample
A bank manager wants to learn more about the time a customer has to wait to be served. He measures waiting time for a sample of 7 randomly selected customers and finds the following values (in seconds): 35, 80, 15, 140, 100, 86, 375. Find the left hand side of the 95% confidence interval on the mean wait time of the population of customers.
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