A class survey in a large class for freshmwn students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 266 students was = 140.9005 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation= 62.6328 minutes in the population of all first-year students at this university.
Employ the survey result to give a 99% confidence interval for the mean study time of all first-year students:____±____(+-0.0001).