Application in Microsoft Excel (Please cross-check the answer manually and print the output from Excel) Suppose that the amount of time teenagers spend weekly working at part time jobs isnormally...

Application in Microsoft Excel
(Please cross-check the answer manually and print the output from Excel)

Suppose that the amount of time teenagers spend weekly working at part time jobs isnormally distributed with a standard deviation of 40 minutes. A random sample of 15 teenagers was drawn, and each reported the amount of time spent at part time jobs (in minutes). These are listed here. Determine the 95% confidence interval estimate of the population mean.

180 130 150 165 90 130 120 60 200 180 80 240 210 150 125