You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of tt

confidence intervals. If convenient, use technology to construct the confidence intervals.

A random sample of 55 home theater systems has a mean price of $137.00. Assume the population standard deviation is $19.30.

Construct a 90% confidence interval for the population mean.

The 90% confidence interval Is (?,?)