NFL football enthusiasts often look at a team s total points
NFL football enthusiasts often look at a team’s total points scored for (Pts F) and total points scored against (Pts A) as a way of comparing the relative strength of teams. The season totals for the 32 teams in the NFL’s 2009 season are shown below:
a. Calculate the linear correlation coefficient (Pearson’s product moment, r) for the points scored for and against.
b. What conclusion can you draw from the answer in part a?
c. Construct the scatter diagram and comment on how it supports, or disagrees with, your comments in part b.
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