Date sent:              Tue, 22 Feb 2000 21:05:02 -0400
From:                   Kenneth Butler <[log in to unmask]>
Subject:                Re: ECAC HEAL from Info-H-L
 
> For those that are interested, here's how seven of the rating systems
> agree (or disagree) with each other. The figures in the table are Spearman
> rank correlations: 1.00 means that the rankings are identical, 0 would
> mean no relationship between the rankings, and -1 would mean complete
> disagreement (the top team on one is the bottom on the other). "Med" is a
> consensus ranking using all seven rating systems.
>
> Spearman rank correlations:
>
>         cchp chodr  heal krachmassey rheal   rpi   med
>   cchp  1.00  0.99  0.78  0.96  0.96  0.92  0.82  0.97
>  chodr  0.99  1.00  0.78  0.94  0.95  0.91  0.81  0.96
>   heal  0.78  0.78  1.00  0.84  0.85  0.84  0.97  0.87
>  krach  0.96  0.94  0.84  1.00  0.99  0.96  0.86  0.99
> massey  0.96  0.95  0.85  0.99  1.00  0.96  0.86  0.99
>  rheal  0.92  0.91  0.84  0.96  0.96  1.00  0.82  0.97
>    rpi  0.82  0.81  0.97  0.86  0.86  0.82  1.00  0.87
>    med  0.97  0.96  0.87  0.99  0.99  0.97  0.87  1.00
 
I'm not sure that a meaningful comparison can be drawn between
CCHP/CHODR and the rest of the rating systems given that they use
different data sets as a basis (CCHP and CHODR are based on game scores
rather than game results [W-L-T], related data but not identical).
Even so, it's interesting that they are so close to KRACH, Massey, and
RHEAL.
 
--
 Craig Powers                   NU ChE class of '98
 [log in to unmask]       http://lynx.neu.edu/home/httpd/c/cpowers
 [log in to unmask]              http://www.hal-pc.org/~enigma
 
"Good..bad....I'm the guy with the gun." -- "Ash" in *Army of Darkness*
 
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