A large labor union wishes to estimate the mean number of ho…
A large labor union wishes to estimate the mean number of hours per month that union members are absent from work. The union samples 475 of its members at random and monitors their working time for 1 month. At the end of the month, the total number of hours absent from work is recorded for each employee. The mean and standard deviation of the sample are 9.6 hours and 3.6 hours, respectively. Find the 95% confidence interval that can be used to estimate the mean (μ) of the entire population of number of hours absent from work per month.