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Wednesday, 16 November 2011

Gambler's fallacy

Posted on 09:11 by Unknown
I was listening to ESPN First Take on Monday (podcast [mp3]) and the hosts were debating whether the Falcons should have punted or not on fourth and short in overtime against the Saints. In wrapping up the debate, Jay Crawford said (around minute 32 of the podcast):
"One thing on your [Jon Ritchie's] numbers deal, because I'm a math guy too. They [the Falcons] have gone for it twice earlier, similar situation, you said that there is a 66.1% probability [sic] of picking it up ... Here's why you don't go for it: they've tried it twice, they've made it twice [earlier in the game], it's probability. Because if you're sitting at a blackjack table and you're playing odds, you're playing three times, and the law of your averages tells you, it's simple math if you try it three times you're going to make it twice and miss it once, and that's exactly how it played out."

Jay then apologizes to Skip Bayless, I guess for being too "mathy". He should be sorry not for using math, but for using math poorly.
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