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Date: | Tue, 13 Dec 1994 20:58:29 -0600 |
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RPICH (Rating Percentage Index for College Hockey) is my implementation
of the Rating Percentage Index (RPI) method that has been used the NCAA
committees in hockey, basketball, and baseball.
RPI ratings have been used by Division 1 Ice Hockey Committee as a tool for
selecting and seeding the teams for the national tournament. While RPICH
is not and has not been supplied to the Committee, it should be identical
to the official ratings.
The method isn't a secret; it has been well-documented in the press and
here on HOCKEY-L. Start with the results of non-exhibition games between
the 44 schools eligible for the Div1 tournament (they each play at least
20 games against Div1 opponents). Calculate the Winning Percentage (WP)
of each team ((wins*2 + ties) / games*2). Now, for each team calculate
the Opponents' Winning Percentage (OWP) by summing the WP of the opponent
in each game (exclusive of games against that team) and dividing by the
number of games. Calculate the Opponents' Opponents' Winning Percentage
(OOWP) for each team by summing the OWP of the opponent in each game and
dividing by the number of games. Finally, RPICH = (WP*.25) + (OWP*.5)
+ (OOWP*.25).
Now, the disclaimer: RPICH IS BASED ON SCORES COMPILED AND CALCULATIONS
PERFORMED INDEPENDENT OF THE NCAA AND ANY AGENTS THEREOF.
If you have any questions, please send them to me ([log in to unmask])
and I'll try to address them all. In the meantime, here's the first RPICH
of the season.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Rating Percentage Index for College Hockey, compiled by Erik Biever
This report includes the 291 games through 12/11/94 between teams eligible
for the Division 1 tournament.
Opp OppOpp
G W L T Win% Win% Win% RPICH
1 Maine 17 12- 0- 5 .8529 .5482 .5389 .6221
2 Colorado College 16 13- 3- 0 .8125 .5456 .5135 .6043
3 Boston University 15 9- 3- 3 .7000 .5988 .4912 .5972
4 Denver 16 11- 5- 0 .6875 .5499 .5233 .5776
5 Minnesota 14 9- 4- 1 .6786 .5456 .5192 .5722
6 Brown 8 6- 2- 0 .7500 .5069 .5096 .5684
7 Michigan 15 11- 4- 0 .7333 .5152 .4965 .5651
8 Michigan State 16 11- 4- 1 .7188 .5231 .4940 .5648
9 New Hampshire 15 10- 3- 2 .7333 .4801 .5219 .5538
10 Harvard 11 5- 5- 1 .5000 .5939 .4922 .5450
11 Northeastern 16 8- 5- 3 .5938 .4954 .5475 .5330
12 Clarkson 11 6- 3- 2 .6364 .4972 .4913 .5305
13 Bowling Green 15 10- 5- 0 .6667 .4724 .4897 .5253
14 RPI 10 6- 4- 0 .6000 .4961 .5023 .5236
15 North Dakota 16 7- 8- 1 .4688 .5500 .5118 .5201
16 Wisconsin 17 8- 8- 1 .5000 .5244 .5163 .5163
17 Michigan Tech 16 7- 7- 2 .5000 .5236 .5057 .5132
18 Dartmouth 7 3- 3- 1 .5000 .5218 .5065 .5125
19 St Cloud 16 8- 8- 0 .5000 .4999 .5074 .5018
20 Vermont 12 7- 5- 0 .5833 .4607 .5005 .5013
21 Western Michigan 15 8- 6- 1 .5667 .4695 .4939 .4999
22 Providence 14 5- 6- 3 .4643 .5266 .4760 .4983
23 Princeton 11 5- 5- 1 .5000 .4875 .5102 .4963
24 Yale 8 3- 4- 1 .4375 .5060 .5083 .4894
25 Boston College 15 4- 9- 2 .3333 .5681 .4822 .4879
26 Northern Michigan 16 7- 9- 0 .4375 .4993 .5031 .4848
27 Illinois-Chicago 15 6- 6- 3 .5000 .4602 .4859 .4766
28 Cornell 6 1- 3- 2 .3333 .5299 .5128 .4765
29 Merrimack 13 3- 7- 3 .3462 .5282 .4804 .4707
30 Mass Lowell 16 7- 6- 3 .5313 .4089 .5145 .4659
31 Colgate 11 5- 5- 1 .5000 .4320 .4956 .4649
32 Lake Superior 14 5- 6- 3 .4643 .4488 .4944 .4641
33 Miami 16 7- 8- 1 .4688 .4433 .4951 .4626
34 St Lawrence 11 3- 7- 1 .3182 .5235 .4725 .4594
35 Union 9 3- 4- 2 .4444 .4376 .4973 .4542
36 Ferris State 14 5- 7- 2 .4286 .4460 .4839 .4511
37 Alaska-Fairbanks 14 3-10- 1 .2500 .5251 .4856 .4465
38 Air Force 8 2- 5- 1 .3125 .5034 .4595 .4447
39 Alaska-Anchorage 16 5-11- 0 .3125 .4662 .5201 .4413
40 Minnesota-Duluth 17 4-11- 2 .2941 .4676 .5096 .4348
41 Ohio State 13 1-10- 2 .1538 .5517 .4778 .4338
42 Army 5 1- 4- 0 .2000 .4401 .4921 .3931
43 Notre Dame 14 1-12- 1 .1071 .4902 .4745 .3905
44 Mass Amherst 12 0-11- 1 .0417 .4036 .5095 .3396
RPICH is calculated by the Rating Percentage Index method, used as a tool
in selecting teams for the national collegiate tournaments in basketball,
baseball, and hockey. Ratings are derived by summing each team's winning
percentage, the average winning percentage of its opponents, and the average
winning percentage of its opponents' opponents, multiplied by 25%, 50%, and
25% respectively. Factors such as home ice and margin of victory are not
included. No individual game is weighted more heavily than any other.
Copyright 1994 Erik Biever. RPICH is freely available for personal use;
if you want to publish it somewhere else, you need my permission.
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