You are given the sample mean and the population standarddeviation. Use this information to construct the​ 90% and​ 95%confidence intervals for the population mean. Interpret the resultsand compare the widths of the confidence intervals. If​ convenient,use technology to construct the confidence intervals.
A random sample of 60 home theater systems has a mean price of$111.00. Assume the population standard deviation is $16.20.
The 90% confidence interval is(--,--)
The 99% confidence interval is(--,--)
Which interval is wider?
