Official PWR
Posted by DeltaOne81
Re: Official PWR
Posted by: jtwcornell91 (---)
Date: January 07, 2003 10:05PM
Since the NCAA doesn't distribute them themselves, nobody's pairwise comparisons are more or less official than anybody else's. (Does anybody say "hey, the official ECAC standings are out"?)
On the other hand, since everyone gets their game results from USCHO, and the USCHO PWR is calculated from the latest game results in their database, the one posted there will at times be more up-to-date than others. (E.g., after the first game result of the day/night lands in the database and before my overnight cron job runs.)
On the other hand, since everyone gets their game results from USCHO, and the USCHO PWR is calculated from the latest game results in their database, the one posted there will at times be more up-to-date than others. (E.g., after the first game result of the day/night lands in the database and before my overnight cron job runs.)
Re: Official PWR
Posted by: DeltaOne81 (---)
Date: January 07, 2003 10:34PM
Get technical with me and I'll get technical back
While you're right that it isn't official via the NCAA, but at the same time USCHO did invent the statistical measure used to mimic the selection committee and named it PWR. So it kinda is "theirs."
While with standings, the exactly math is well defined, your PWR scheme is slightly different from USCHO. Yours breaks a tie on a comparision by comparision basis, breaking with with RPI. USCHO will give that comparison to nobody, and break the overall ties with RPI. I could certainly forsee a situation in which that could make a difference in the overall standings, so I was curious if USCHO's method would come out the same.
Of course I guess the next question is who's is closer to the committee's method. Though yours certainly makes the prettier graph .
And nothing takes away from your real victory of today, you being a major reason why KRACH is officially listed on USCHO - and getting a link to your site from their KRACH page.
-Fred
While you're right that it isn't official via the NCAA, but at the same time USCHO did invent the statistical measure used to mimic the selection committee and named it PWR. So it kinda is "theirs."
While with standings, the exactly math is well defined, your PWR scheme is slightly different from USCHO. Yours breaks a tie on a comparision by comparision basis, breaking with with RPI. USCHO will give that comparison to nobody, and break the overall ties with RPI. I could certainly forsee a situation in which that could make a difference in the overall standings, so I was curious if USCHO's method would come out the same.
Of course I guess the next question is who's is closer to the committee's method. Though yours certainly makes the prettier graph .
And nothing takes away from your real victory of today, you being a major reason why KRACH is officially listed on USCHO - and getting a link to your site from their KRACH page.
-Fred
Re: Official PWR
Posted by: jtwcornell91 (---)
Date: January 08, 2003 08:30AM
DeltaOne81 '03 wrote:
[lists.maine.edu]
Actually, Keith Instone invented the concept of totalling up the number of comparisons; USCHO (in the person of Time Brule) came up with the name PWR:
While you're right that it isn't official via the NCAA, but at the same time USCHO did invent the statistical measure used to mimic the selection committee and named it PWR. So it kinda is "theirs."
[lists.maine.edu]
Well, my ECAC standings page breaks ties by the ECAC tiebreakers rather than alphabetically, but it's still the ECAC standings either way.
While with standings, the exactly math is well defined, your PWR scheme is slightly different from USCHO. Yours breaks a tie on a comparision by comparision basis, breaking with with RPI. USCHO will give that comparison to nobody, and break the overall ties with RPI. I could certainly forsee a situation in which that could make a difference in the overall standings, so I was curious if USCHO's method would come out the same.
Re: Official PWR
Posted by: Greg Berge (---)
Date: January 08, 2003 08:51AM
What are the ECAC tiebreakers now? We used to have privileged categories like "record against playoff teams," but now that's meaningless.
Oh, and is infinite regress still possible?
Oh, and is infinite regress still possible?
Re: Official PWR
Posted by: jtwcornell91 (---)
Date: January 08, 2003 09:30AM
I can explain the ECAC tiebreakers when I get back to New Orleans tonight. The way out of the infinite loop was explained a couple of years ago. The only change for this year is that "top5" and "top10" have gone back to "top4" and "top8".
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