Question: The Boston Globe wants to estimate the mean time spent by subscribers reading its newspaper. .A random sample of 49 subscribers reveals a sample mean of 20.5 minutes and a sample standard deviation of 8 minutes.

a. Construct a 99 percent confidence interval estimate for the population mean time spent by subscribers reading its newspaper.

a. With 99 percent confidence, what sample size is needed if the Boston Globe wants to be within 1 minute of the true population mean?