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RATINGS PERCENTAGE INDEX
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 heavy emphasis upon strength of
schedule is seen, by many, to give an unfair advantage to major
conferences, which are allowed to fill several slots where smaller
conferences may only get one slot. The NCAA does not release the RPI to
the public, but independent sources, such as
ESPN or
CNN/SI, usually publish their own calculations.
The RPI was updated
in 2004 to account for differences in home and away games. A home win
now counts as 0.6 wins, while a road win counts as 1.4 wins, while a
home loss counts as 1.4 losses, while a road loss counts as 0.6 losses.
See Also
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