Question: A simple random sample with n = 52 provided a sample mean of 28.5 and a sample standard deviation of 4.4. (a) Develop a 90%

A simple random sample with n = 52 provided a sample mean of 28.5 and a sample standard deviation of 4.4.

(a) Develop a 90% confidence interval for the population mean.

(b) Develop a 95% confidence interval for the population mean.

(c) Develop a 99% confidence interval for the population mean.

(d) What happens to the margin of error and the confidence interval as the confidence level is increased?

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