Saturday, September 12, 2009
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College Football RPI (SOS in parenthesis)
Until all teams have played at least two games against D1 opponents the RPI won't be updated. This season will be the first time all games against D1 opponents will be calculated for this site (FBS and FCS). Games against D2 and lower will not be part of the rankings
Explanation of the RPI
The Ratings Percentage Index (RPI) is the formula used by the NCAA to rate men’s and women’s college basketball teams. The formula is described below.
The RPI is calculated by adding three parts.
Part I (25% of the formula): Team winning percentage. For the 2005 season, the NCAA added a bonus/penalty system depending on home/away which is included in the CFB RPI seen on this page.
Part II (50%): Average opponents’ winning percentage. To calculate this, you must calculate each opponent’s winning percentage individually and average those figures. This is NOT calculated from the opponents’ combined record. Games involving the team for whom we are calculating the RPI are ignored.
Part III (25%): Average opponents’ opponents’ winning percentage: Basically taking all of the opponents’ Part II values and averaging them.
Only games against other teams playing a mostly D1 schedule count when computing the RPI.
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