Question 3 When 127 randomly selected U.S. workers aged 18 - 25 in the 2008 General Social Survey were asked how many hours they worked in the previous week, the mean was 37.47 with a standard deviation of 13.63. Does this suggest that the population mean work week for this age group differs from 40 hours? Follow the steps below to answer this question, using a significance level of 5%. Use the Minitab output to help you. Note that the assumptions were checked, and are all met. One-Sample T

Descriptive Statistics N Mean StDev SE Mean 95% Cl for u 127 37.47 13.63 1.21 (35.08, 39.86) : population mean of Sample Test Null hypothesis Ho: 1 = 40 Alternative hypothesis H,: ul # 40 T-Value P-Value -2.09 0.038