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Some people did a lot of work, and really didn't give us any information that we didn't already know. The fact that 'bias' exists is not new. Bias in and of itself is not good or bad in this case, it just is. The expansion of the zone at 3-0 and the constriction of it at 0-2 is more a cultural and historical phenomenon rather than an error in judgement.
The statistical analysis of any human performance has to take into account the fact that as humans, we are not perfect. Umpires are not robots, we see pitches through the lens of a human eye, not a high speed digital camera. There are so many random factors that could affect the performance of an umpire, that statistical inferences might be irrelevant, and in no way should be the only way to evaluate performance.
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Bob P.
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We are stewards of baseball. Our customers aren't schools or coaches or conferences. Our customer is the game itself.
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Sat Apr 05, 2014, 10:28am
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