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re: KenPom SEC Hoops Update (Quality Wins and Bad Losses so far)

Posted on 12/5/16 at 5:39 pm to
Posted by Pettifogger
Capitol Hill Autonomous Zone
Member since Feb 2012
79504 posts
Posted on 12/5/16 at 5:39 pm to
So KenPom is still heavily reliant on preseason expectations, is that right? Meanwhile, in our example, AU went from like 200 to 20 something in RPI because it's focused on where we stand today (at least how RPI gauges it).

I'm not arguing for RPI over KenPom, as it makes no more intuitive sense than KenPom does.

But in KenPom, Auburn with a decent record after playing a mediocre but not terrible OOC schedule is ranked sub 100 while UGA is 60ish because KenPom thinks UGA is a better team and that will eventually show up as the season progresses, is that correct?
Posted by volfan30
Member since Jun 2010
40965 posts
Posted on 12/5/16 at 5:51 pm to
quote:

So KenPom is still heavily reliant on preseason expectations, is that right? Meanwhile, in our example, AU went from like 200 to 20 something in RPI because it's focused on where we stand today (at least how RPI gauges it).

I'm not arguing for RPI over KenPom, as it makes no more intuitive sense than KenPom does.

But in KenPom, Auburn with a decent record after playing a mediocre but not terrible OOC schedule is ranked sub 100 while UGA is 60ish because KenPom thinks UGA is a better team and that will eventually show up as the season progresses, is that correct?



This is essentially correct. Margin of victory and even in game leverage are also included in KenPom, where as they're not in RPI.

Tennessee's 2014 Sweet 16 team blew out a lot of good opponents and every game they lost seemed to be close. KenPom attributes that to poor luck since there's only a 35 game sample size and thus a 13 loss Tennessee team that had to play in a play in game as an 11 seed was ranked #10 overall on KenPom. Tennessee ended up 1 point away from the Elite 8, so it verified the ranking somewhat, but that is just one example of the factors that come in to play.

Conversely, if your team wins in a lot of close games and loses in blowout fashion somewhat often KenPom will deem you lucky and you will likely be ranked much lower than maybe your record would indicate.
Posted by GatorsGators
Member since Oct 2012
13454 posts
Posted on 12/5/16 at 11:42 pm to
quote:

So KenPom is still heavily reliant on preseason expectations, is that right? Meanwhile, in our example, AU went from like 200 to 20 something in RPI because it's focused on where we stand today (at least how RPI gauges it).
Yes, KenPom is largely useless at this point of the season, like RPI, although for different reasons (like you said, KenPom replaces missing data with predictors whereas RPI just doesn't have a lot of data).

If there's any site I'd use at this point, it's RPIPredictor. It uses Sagarin's predictor to predict what each team's RPI would be at a certain record.
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