E Homework Proctored Test 2 Review (90% or better 5 extra .. Part 1 of 3 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 50 home theater systems has a mean price of $143.00 Assume the population standard deviation is $17 40 Construct a 90% confidence interval for the population mean The 90% confidence interval is ( (Round to two decimal places as needed )