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Mathletics by Wayne L. Winston

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42

 

THE RATINGS PERCENTAGE INDEX (RPI)

During the college basketball season hoop fans anxiously anticipate the selection and seeding of teams for the NCAA tournament. The NCAA selection committee wants an accurate view of the teams' relative abilities, but, like the BCS selection committee, the NCAA tournament selection committee wants to use only a team's win-loss record and not the score of their games to rank teams. The NCAA believes that including game scores in the ranking and seeding process would cause the top teams to try and run up the score on lesser opponents. In chapter 40 we explained how to use a logistic regression-based ranking system to rank NFL teams. An identical system would do an excellent job of ranking college basketball ...

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