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Wishing to determine the average amount of time a customer must wait to be helped, a bank took a random sample of 36 customers
Wishing to determine the average amount of time a customer must wait to be helped, a bank took a random sample of 36 customers and found the mean waiting time was 3.7 minutes. If the population standard deviation is assumed to be 1,2 minutes, find a 92.32% confidence interval for the mean waiting time for customers. Round your final answer to three decimal places, if necessary. (3.575, 3.825) (3.275, 4.125) (3.414, 3.986) (3.346, 4.054)
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