Name ______________________________________
Chapter 7 - Scatterplots
At the end of the 2011 college football season, the University of Alabama defeated Louisiana State University
for the national championship. Interestingly, both of these teams were from the Southeastern Conference
(SEC).. Here are the average number of points scored per game and number of wins for each of the twelve
teams in the SEC that season.
Team
Alabama
Arkansas
Auburn
Florida
Georgia
Kentucky
Louisiana State University
Mississippi
Mississippi State
South Carolina
Tennessee
Vanderbilt
Points per game
34.8
36.8
25.7
25.5
32.0
15.8
35.7
16.1
25.3
30.1
20.3
26.7
Wins
12
11
8
7
10
5
13
2
7
11
5
8
1. Make a scatterplot of the relationship between points per game and wins. Make sure to label both axes.
2. Describe what the scatterplot reveals about the relationship between points per game and wins.
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3. Calculate the correlation coefficient and interpret the value of r in context of the data.
4. The point on the graph representing Mississippi seems to be affecting the data. Calculate r without
Mississippi and describe what effect it has.
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