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Tuesday, March 01, 2011
K per PA
Great chart by Patriot that shows the difference between K per IP and K per PA using Greg Maddux.
Per IP may be more convenient to look at, but analytically, you should use per PA. The denominator has to be opportunities, trials, attempts. It should not be successes. Doing that, using IP or outs in the denominator, means you are generally doing a ratio, not a rate (H per 9IP is a ratio of hits to outs). Or in the case of K, it’s a rate of outs made by K, which is not generally something you want to know.
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