Neyman–Pearson lemma: Difference between revisions

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{{Unreferenced|date=December 2009}}
{{Sabermetric | formula = <math>H/9 = 9 \cdot \frac{H}{IP}</math>}}
In [[baseball statistics]], '''hits per nine innings''' (denoted by '''H/9''') is the average number of [[Hit (baseball statistics)|hits]] allowed by a [[pitcher]] in a nine inning period; calculated as: (hits allowed x 9) / [[innings pitched]].  This is a measure of a pitcher's success based on the number of all outs he records.


Compared to a pitcher's [[batting average against]], a pitcher's H/9 benefits from [[sacrifice bunt]]s, [[double play]]s, runners [[caught stealing]], and [[assist (baseball)|outfield assist]]s, but it is hurt by some [[error (baseball)|errors]]. Unlike batting average against, a pitcher's H/9 benefits from outs that are not related to official at bats, as they are recorded on runners after they have reached base.


==See also==
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*[[Walks plus hits per inning pitched]] (WHIP)
 
{{DEFAULTSORT:Hits Per Nine Innings}}
[[Category:Pitching statistics]]
 
 
{{Baseball-stub}}

Revision as of 21:51, 1 March 2014


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