USA Today reports that NCAA colleges and universities are paying higher salaries to a newly recruited football coach compared to what they paid their previous football coach. (USA Today, February 12, 2013). The annual base salaries for the previous head football coach and the new head football coach at 23 schools are given in the file Coaches.

a. Determine the median annual salary for a previous head football coach and a new head football coach.

b. Compute the range for salaries for both previous and new head football coaches.

c. Compute the standard deviation for salaries for both previous and new head football coaches.

d. Based on your answers to a-c, comment on any differences between the annual base salaries a school pays a new head football coach compared to what it paid its pervious head football coach.