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A random sample of 40 students required an average of 93.4 minutes to complete a stats exam. Assume that the population standard deviation to complete

A random sample of 40 students required an average of 93.4 minutes to complete a stats exam. Assume that the population standard deviation to complete the exam was 11.7 minutes the margin of error for a 97% confidence interval around this sample mean is? 4.30, 4.01,3.70,2.04

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