The following table gives a football team?s season-ticket sales, percentage of games won, and number of active alumni for the years 1998?2015.

a. Enter the data into an electronic file.

b. Estimate a regression model for sales = Percentage of games won.

c. Estimate a regression model for sales = Number of active alumni.

d. Estimate a multiple regression model predicting sales using variables of your choice.

e. If sales is the dependent variable, which of the two independent variables do you think explains sales better? Explain.

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Percentage of Season-Ticket Number of Year Sales Games Won Active Alumni 4,995 8,599 8,479 8,419 1998 40 NA 3,450 1999 54 2000 55 3,801 4,000 2001 58 2002 2003 10,253 12,457 13,285 14,177 63 4,098 6,315 6,860 8,423 9,000 15 2004 36 27 2005 2006 15,730 63 2007 15,805 15,575 70 9,500 9,530 2008 72 2009 15,900 14,010 12,500 10,900 75 9,550 9,560 9,575 2010 80 2011 82 2012 30 9,540 9,580 2013 9,998 12,750 14,050 25 2014 78 9,705 10,000 2015 78