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An
important component for NCAA tournament selection is the Ratings
Percentage Index (RPI). RPI is based on a formula, described below,
that uses arbitrary weights to determine a teams rankings. A number
of alternative methods have been suggested. The ratings here are
based on what David
Mease uses to rank college football teams. A major difference
between college hockey and college football is that ties are
possible. For these rankings, the probability of a tie is explicitly
included in the model. For
a detailed description of the model, please see the slides of an talk I gave
at a
Allegheny Mountain sectional meeting of MAA.
These ratings are updated each morning. Data used to determine the rankings are non-exhibition games against division III teams. Some teams listed below are not D-III, but are included due to the fact the play a primarily D-III schedule. Only the win/loss/tie result is used. Margin of victory and and location of game information are are not used.
Detailed current D-III RPI can be found here. Quoting from USCHO.com, RPI uses only results from games between two teams that each play 20 or more games against Division III opponents. Factors involved are 1) the team's winning percentage; 2) the average winning percentage of the team's opponents; and 3) the average winning percentage of the team's opponents' opponents. These factors are multiplied by 30%, 24%, and 46% respectively. Please note that these rankings include all Division III teams and I will not being eliminating games against the weakest four opponents as the NCAA does.
My name is Michael Rutter and I am an Assistant Professor of Statistics and Mathematics at Penn State Erie-The Behrend College. I can be reached at mar36@psu.edu. I used to work at Mercyhurst College and I am currently an off-ice statistician for the Mercyhurst Lakers Women's Hockey team. I am known as “LakersFan” on the USCHO.com message boards, so feel free to comment there as appropriate.
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work is licensed under a Creative
Commons License.