The manager of The Cheesecake Factory in Boston reports the following numbers of customers for nine randomly selected workdays in August of 2013: 150, 130, 135, 202, 185, 203, 182, 165, 198.
Create a 95% confidence interval for the mean number of customers.
The mean number of customersis supposed to be 200. Using your results from the part (a), does the manager have reasons to be concerned about her/his restaurant?