Question

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 45 home theater systems has a mean price of ​$140.00. Assume the population standard deviation is ​$16.20. Construct a 90% confidence interval for the population mean. The 90% confidence interval is (_,_) Constrcut a 95% interval for the population mean. The 95% confidence interval is 9_,_)

Answer 1