Question

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, February 12, 2012). Team YDS/ATT WinPct Ariziona Cardinals 6.1 19 Atlanta Falcons 6.6 27 Carinlona Panthers 7.1 31 Chicago Bears 7.5 34 Dallas Cowboys 7.0 37 New England Patriots 8.1 51 Philadelphia Eagles 6.4 27 Seattle seahawks 8.4 50 St. Louis Rams 6.4 27 Tampa Bay Bucceneer 7.9 49 a. Choose the correct a scatter diagram for these data: b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables? The scatter diagram indicates a - Select your answer -negativepositive linear relationship between average number of passing yards per attempt and the percentage of games won by the team. c. Develop the estimated regression equation that could be used to predict the percentage of games won given the average number of passing yards per attempt. Enter negative value as negative number. ( ) (to 2 decimals) d. Provide an interpretation for the slope of the estimated regression equation (to 1 decimal). The slope of the estimated regression line is approximately . So, for every - Select your answer -increasedecrease of one yard in the average number of passes per attempt, the percentage of games won by the team increases by %. e. The average number of passing yards per attempt for the other Team was . Use the estimated regression equation developed in part (c) to predict the percentage of games won by the team. (to 2 decimals)

Answer #1

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 conference (Conf), average number of
passing yards per attempt (Yds/Att), the number of interceptions
thrown per attempt (Int/Att), and the percentage of games won
(Win%) for a random sample of 16 NFL teams for a
season
Team
Conf
Yds/Att
Int/Att
Win%
Arizona Cardinals
NFC
6.4...

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 conference (Conf), average number of
passing yards per attempt (Yds/Att), the number of interceptions
thrown per attempt (Int/Att), and the percentage of games won
(Win%) for a random sample of 16 NFL teams for one full season.
Team
Conf
Yds/Att
Int/Att
Win%
Arizona Cardinals
NFC...

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 conference (Conf), average number of
passing yards per attempt (Yds/Att), the number of interceptions
thrown per attempt (Int/Att), and the percentage of games won
(Win%) for a random sample of 16 NFL teams for a season
Team
Conf
Yds/Att
Int/Att
Win%
Arizona Cardinals
NFC
6.7...

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 conference (Conf), average number of
passing yards per attempt (Yds/Att), the number of interceptions
thrown per attempt (Int/Att), and the percentage of games won
(Win%) for a random sample of 16 NFL teams for a season.
Excel File
https://drive.google.com/file/d/1pfIsW3U477qRB8nj0fv_PD1fnRHV68Xx/view?usp=sharing
(a)
Using Excel Regression Analysis, write...

In exercise 24 an estimated regression equation was developed
relating the percentage of games won by a team in the national foot
ball league for the 2011 season (y) given the average number of
passing yards obtained per game on offense (x1) and the
average number of yards given up per game on defense
(x2) The estimated regression equation was
y=60.5+.319x1-.241x2
Team
OffPassYds/G
DefYds/G
Win%
Arizona
222.9
355.1
50.0
Atlanta
262.0
333.6
62.5
Baltimore
213.9
288.9
75.0
St Louis
179.4...

Before 2012, National Football League (NFL) football games that
were tied at the end of regulation time continued after a coin
toss. The team that won the coin toss could choose to receive the
ball ir kick the ball. A whopping 98.1% of teams that won the coin
toss chose to receive the ball. Between 1974 and 2011, there were
460 overtime games that did not end in a tie. Among those 460 games
that decided were in overtime, 252...

The following data represents the winning percentage (the number
of wins out of 162 games in a season) as well as the teams Earned
Run Average, or ERA.
The ERA is a pitching statistic. The lower the ERA, the less runs
an opponent will score per game. Smaller ERA's reflect (i) a good
pitching staff and (ii) a good team defense. You are to investigate
the relationship between a team's winning percentage - ?Y, and its
Earned Run Average (ERA)...

The following table presents data on the ratings of quarterbacks
for the 2008 National Football League season (The Sports
Network).
Player
Team
Yards per Attempt
Rating Points
Philip
Rivers
SD
8.39
105.5
Chad
Pennington
MIA
7.67
97.4
Kurt
Warner
ARI
7.66
96.9
Drew
Brees
NO
7.98
96.2
Peyton
Manning
IND
7.21
95.0
Aaron
Rodgers
GB
7.53
93.8
Matt
Schaub
HOU
8.01
92.7
Tony
Romo
DAL
7.66
91.4
Jeff
Garcia
TB
7.21
90.2
Matt
Cassel
NE
7.16
89.4
Matt
Ryan
ATL...

The California Standardized Testing and Reporting (STAR) dataset
contains data on test performance, school characteristics and
student demographic backgrounds. The data used here are from all
420 K-6 and K-8 districts in California with data available for
1998 and 1999. Test scores are the average of the reading and math
scores on the Stanford 9 standardized test administered to 5th
grade students. TESTSCR: AVG TEST SCORE (= (READ_SCR+MATH_SCR)/2 );
STR: STUDENT TEACHER RATIO (ENRL_TOT/TEACHERS); Using the provided
table, write down...

Computing the regression line and making
predictions
Suppose you are a dolphin trainer at SeaWorld. You teach the
dolphins by rewarding them with fish treats after each successful
attempt at a new trick. The following table lists the dolphins, the
number of treats per success given to each, and the average number
of attempts necessary for each to learn to perform the tricks.
Dolphin
Number of Treats
Number of Attempts
Diana
3
7
Frederick
2
8
Fatima
4
5
Marlin...

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