To determine the views of students on a particular campus about fraternities, and 11-point attitude scale was administered to a random sample of 40 students. This survey yielded a sample mean of 6 (the higher the score, the more favorable the view of the fraternities) and a standard deviation of 1.5.
a. Estimate the standard error of the mean.
b. Find the 95% confidence interval for the population mean.
c. Find the 99% confidence interval for the population mean.