Executive MBA programs have become increasingly popular. In an article entitled “The Best Executive MBAs,” Business Week provided data concerning the top 25 executive MBA programs. The tuition for each of the schools selected was given. A file entitled EMBA contains this data.

a. Calculate the 20th, 40th, 60th, and 80th percentile among the ranks.

b. Calculate the mean and standard deviation of the tuition for the five subgroups defined by the rank percentiles in part

a. (Hint: For this purpose, are the data subgroups samples or populations?)

c. Do the various subgroups’ descriptive statistics echo their standing among the listed programs?

Comment.