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Tangotiger Blog

A blog about baseball, hockey, life, and whatever else there is.

Thursday, January 22, 2015

Ratios v Differentials

This fellow gives us a clean formula to estimate the success rate of a FG kick by distance.  He then had two choices as to how to present it, either as an index or as a differential.  He went with index.  This was not a good choice.

Why is that?  Because if a kicker attempts alot of 95% field goals, and he gets 100%, his "score" for that is going to be 1.05.  If overall across all his attempts he's 1.15, then his perfect score here (100% v 95%) actuall?y brings down his overall average.

The better way would have been as a differential, either relative to average, or relative to some lower baseline.

(5) Comments • 2015/01/24 • Football

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January 22, 2015
Ratios v Differentials