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Commonly known as 'RPI,' the Ratings Percentage Index is a rating system where NCAA basketball teams are ranked. This system has been in use since 1981 to aid in selecting and seeding of the teams appearing in the 65-team men's playoffs (see also, March Madness). It has also been used to aid in the selection and seeding process for the 64-team women's tournament since its inception in 1982. The weights are 25% winning percentage, 50% Strength of Schedule, and 25% opponent Strength of Schedule. The NCAA does not release the RPI to the public, but independent sources, such as ESPN or CNNSI, usually publish their own calculations.See Also
March Madness, Bracketology , Final Four
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