Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.


The following scatterplot shows the number of wins and the attendance per game for baseball teams in . Also shown are the least-squares regression line and computer output.

(a) Interpret the slope of the least-squares regression line in context.
(b) Explain why it is not reasonable to use the least-squares regression model to predict attendance per game for
(c) What is the value of the correlation coefficient for the sample?
(d) If the point representing 64 wins and attendance of 40,000 people per game is removed from the set of data and a new regression analysis is conducted, how would the following be impacted? Explain your reasoning.

(i) The slope of the least-squares line:

(ii) The correlation coefficient: