Hah, it's the ebbs and flows of a baseball season, I was sure you couldn't provide that data, I Said Good Day! Smarten up, man. I mean, wouldn't Standard Deviation result in it's mean? This is all, already calculated on baseball.
There's nothing wrong with a bat that's historically 20% better than average to bat 5th in a lineup, ever, especially a guy with his pop, he puts up 4-5 Wins consistently year in and out, yes it's silly.