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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 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 ​$148.00. Assume the population standard deviation is ​$18.60. Construct a​ 90% confidence interval for the population mean.

The​ 90% confidence interval is ​(___,___)

​(Round to two decimal places as​ needed.)

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