In Exercise 10.34 on page 571, we use the data in NBAStandings to predict NBA winning percentage based on PtsFor and PtsAgainst. Use technology to find the residuals for fitting that model and construct appropriate residual plots to assess whether the conditions for a multiple regression model are reasonable.

Exercise 10.34 on page 571

A common (and hotly debated) saying among sports fans is ‘‘Defense wins championships.’’ Is offensive scoring ability or defensive stinginess a better indicator of a team’s success? To investigate this question we’ll use data from the 2010–11 National Basketball Association (NBA) regular season. The data stored in NBAStandings include each team’s record (wins, losses, and winning percentage) along with the average number of points the team scored per game (PtsFor) and average number of points scored against them (PtsAgainst).