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 (Yds/Att) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season (NFL website). Team Yds/Att WinPct Arizona Cardinals 6.7 52 Atlanta Falcons 7.4 63 Carolina Panthers 7.8 67 Chicago Bears 6.8 50 Dallas Cowboys 5.9 31 New England Patriots 7.8 71 Philadelphia Eagles 7.6 70 Seattle Seahawks 6.9 52 St. Louis Rams 5.8 36 Tampa Bay Buccaneers 8.5 84 -select your answer choices- a. (A, B, C, D) b. The scatter diagram indicates a (positive, negative) linear relationship between x= average number of passing yards per attempt and y= the percentage of games won by the team. d. The slope of the estimated regression line is approximately __. So, for every (increase, decrease) of one yard in the average number of passes per attempt, the percentage of games won by the team increases by __% e. Considering the small data size, the prediction made using the estimated regression equation (is not too bad, is really bad).
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 (Yds/Att) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season (NFL website).
Team | Yds/Att | WinPct |
Arizona Cardinals | 6.7 | 52 |
Atlanta Falcons | 7.4 | 63 |
Carolina Panthers | 7.8 | 67 |
Chicago Bears | 6.8 | 50 |
Dallas Cowboys | 5.9 | 31 |
New England Patriots | 7.8 | 71 |
Philadelphia Eagles | 7.6 | 70 |
Seattle Seahawks | 6.9 | 52 |
St. Louis Rams | 5.8 | 36 |
Tampa Bay Buccaneers | 8.5 | 84 |
-select your answer choices-
a. (A, B, C, D)
b. The
d. The slope of the estimated regression line is approximately __. So, for every (increase, decrease) of one yard in the average number of passes per attempt, the percentage of games won by the team increases by __%
e. Considering the small data size, the prediction made using the estimated regression equation (is not too bad, is really bad).
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