Question: A simple random sample of 60 items resulted in a sample mean of 80 . The population standard deviation is =15 . Assume that the

A simple random sample of 60 items resulted in a sample mean of 80 . The population standard deviation is =15 . Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean. Round your answers to two decimal places.

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