18. Refer to exercise 10, where data were reported on a variety of statistics for the 29 teams in the National Basketball Association for a portion of the 2004 season (http://www.

nba.com, January 3, 2004).

a. In part

(c) of exercise 10, an estimated regression equation was developed relating the proportion of games won given the percentage of field goals made by the team, the proportion of three-point shots made by the team’s opponent, and the number of turnovers committed by the team’s opponent. What are the values of R2 and ?

b. Does the estimated regression equation provide a good fit to the data? Explain.