
On 2/17/12, Kentucky is ranked #1 in both the AP and Coaches/ESPN Polls. I’m thrilled that biased human pollsters think my Cats are #1. However, as a stat guy, I realize that human pollsters are often biased and often wrong. Every season, we see teams that are ranked highly due to complete human bias without any actual merit. It’s amazing how certain teams can lose and lose again, but only drop 1 to 2 spots in the polls. We also see teams who are ranked highly only due to the law of inertia. When ranked #4, Louisville was a prime example of the law of inertia. I don’t think any rational sports fan actually thought Louisville was really the 4th best team in the NCAA based on the way they had been playing. Sure, Louisville was winning, but they did not appear to be the #4 team. Louisville didn’t look impressive, but they managed to keep winning as teams ahead of them lost. Murray State was another example of the law of inertia. Did anyone ever truly think that Murray State was actually the 7th best team in the NCAA? Not likely.
Human polls clearly have their place, but we need to be honest in realizing that they are biased and flawed. I’m sure you’re aware, but there are multitudes of much more cold and unbiased rankings available. Stat-based rankings certainly have their flaws, but when combined with the human polls, you gain a much clearer picture of where teams actually belong in the rankings.
Most people are family with the RPI. RPI is a good tool, but it has some major flaws. The biggest flaw is that RPI does not make concessions for margin of victory or defeat. A win is treated the same way whether it is by 1 or 100. RPI also does not care about road, home, or neutral site games. Kentucky is currently #3 in RPI.
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