"standard deviation is a measure of the variability or dispersion of a population, a data set, or a probability distribution."
The variability or dispersion inherent in a data set has more variability in smaller sample sizes. If the team ERA is say 4.00, one catcher may have been behind the plate for 2 runs, the other for 6 runs. The deviation from the norm is greater. The smaller the sample size [2 months in 2007/2009 as opposed to 2008] will yield to a greater deviation. Also, as the controls change [teams, leagues, ball parks] so will the deviation, which is why Woolner's analysis is a joke. Go back to school folks.
Regardless of the semantics, my point is the same. If you flip a coin once, you will have a greater deviation than if you flip it 1000 times.
Anyways, until Jacko comes up with any proof, the argument is over. I hope to God that at the end of 2009, I'm wrong. I really do. Because for that to happen, Posada would have to learn how to frame a pitch and get his CERA down to below 4.
If that happens, I'll be inviting all of you to my wedding with Megan Fox, and I would ask Jacko to be my best man.
On tonights game, only that Ruiz? homer was a cheapie, I thought everything else was crushed. Tex hit the longest homer yet at the new stadium.