Question: A sample of 240 observations is selected from a normal population with a population standard deviation of 24. The sample mean is 20. a. Determine

A sample of 240 observations is selected from a normal population with a population standard deviation of 24. The sample mean is 20.

a. Determine the standard error of the mean. (Round your answer to 3 decimal places.)

c. Determine the 90% confidence interval for the population mean. (Round your answers to 3 decimal places.)

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