The co-efficient of variation

Gabriel Rogers debuted at It Figures with a post on batsmen’s consistency. The main tool he used was the co-efficient of variation – the standard deviation divided by the mean. In general I think this is OK, but there is a problem with including players with short careers in the analysis. The problem is that shorter careers might tend to have lower CV’s. (I haven’t checked this empirically.) To show this I’ll play with exponential…

"The co-efficient of variation"