The National Football League (NFL) records a variety of performance data for individuals and teams. To investigate the importance of passing on the percentage of games won by a team, the following data show the average number of passing yards per attempt (Yards/Attempt) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season. t Team Yards/Attempt WinPct Arizona Cardinals 6.5 50 Atlanta Falcons 7.1 63 Carolina Panthers 7.4 38 Chicago Bears 6.4 50 Dallas Cowboys 7.4 50 New England Patriots 8.3 81 Philadelphia Eagles 7.4 50 Seattle Seahawks 6.1 44 St. Louis Rams 5.2 13 Tampa Bay Buccaneers 6.2 2590 : 8 8 888 88683888 60 Win % Win % 50 Win % 40- 30 30 20 10 20- 10 10+ 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 O Yards/Attempt Yards/Attempt Yards/Attempt 8:88 50 Win % 40 30 20 10 5 6 7 8 9 Yards/Attempt