In 1998, Mark McGwire hit 70 homers to break Roger Mariss old record of 61, and yet McGwire wasnt voted the Most Valuable Player (MVP) in his league. To try to understand how this happened, you collect the following data on MVP votes, batting average (BA), home runs (HR), and runs batted in (RBI) from the 1998 National League:
Just as you are about to run the regression, your friend warns you that you probably have multicollinearity.
a. What should you do about your friends warning before running the regression?
b. Run the regression implied in this example (votes as a function of BA, HR, and RBI), with positive expected signs for all three slope coefficients. What signs of multicollinearity are there?
c. What suggestions would you make for another run of this equation? In particular, what would you do about multicollinearity?
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