NoCar-- you seemed like such a nice guy, and then you went and asked me questions like that. I don't have a formal statistics background-- ironically enough Alan used to work for a place that did studies like that, but he is not one of the four here who make figures.

Alan and I just talked about it, and it sounds like you might be describing techniques used for large population studies, or for finding averages (I could be wrong, since I really don't know what the hell "SPC" and "six sigma type analysis" are, and if you are bluffing, nice job). George might want to take a crack at this too, when he gets done laughing at my trying to deal with it. Anyway, if you want to define the terms, I'll take a shot at answering it.

I'm not going to wear the hat on the golf course since I don't want anyone to use SPC to equate my ability to get out of sand traps with my ability to make figures.



TGJB