College basketball is big business, with coaches' salaries, revenues, and expenses in millions of dollars. The file College Basketball contains the coaches* salary and revenue for college basketball at 60 of the 65 schools that played in the 2009 NCAA men's basketball tournament. (Data extracted from "Compensation for Division I Men's Basketball Coaches," USA Today, April 2, 2010, p. 8C; and C. Isadore, "Nothing but Net: Basketball Dollars by School," money.cnn.com/2010/03/18/news/companies/basketball profits.)
a. Compute and interpret the coefficient of correlation, r.
b. At the 0.05 level of significance, is there a significant linear relationship between a coach's salary and revenue?