Science Abuse Posted February 24, 2005 Report Share Posted February 24, 2005 This rat fuckin bastard right here: http://spiff.rit.edu/classes/phys240/lectures/intro/mu.gif Specificaly in use as such: http://mathcentral.uregina.ca/RR/database/RR.09.95/weston28.gif I'm doing self-taught Statistical Procces Control and I've hit an impass with this bastard of a symbol. The book is using it like I'm supposed to know what it represents, and doesn't define it. It comes up in the equasion for population standard deviation, but sample standard deviation uses the sample mean in its place. I've used it in Physics, but friction has no bearing in calculation standard deviation. Anyone out there know what this bitch means? Quote Link to comment Share on other sites More sharing options...
Mensan Posted February 25, 2005 Report Share Posted February 25, 2005 When looking at electrical symbols, it means "micro". Edit: Also the sorority of the fat chicks in "Revenge of the Nerds". Quote Link to comment Share on other sites More sharing options...
Guest doggunracing Posted February 25, 2005 Report Share Posted February 25, 2005 Expected value. If discrete, sum of each x times it's probability. If continuous, integral of x times f(x). Discrete case : When a die is thrown, each of the possible faces 1, 2, 3, 4, 5, 6 (the xi's) has a probability of 1/6 (the p(xi)'s) of showing. The expected value of the face showing is therefore: µ = E(X) = (1 x 1/6) + (2 x 1/6) + (3 x 1/6) + (4 x 1/6) + (5 x 1/6) + (6 x 1/6) = 3.5 Notice that, in this case, E(X) is 3.5, which is not a possible value of X. Quote Link to comment Share on other sites More sharing options...
integranator Posted February 25, 2005 Report Share Posted February 25, 2005 doesn't mu stand for the co-efficient of friction? Quote Link to comment Share on other sites More sharing options...
Guest doggunracing Posted February 27, 2005 Report Share Posted February 27, 2005 Originally posted by Tenzig: I've used it in Physics, but friction has no bearing in calculation standard deviation.You figure this out, you low-browed Viking? Quote Link to comment Share on other sites More sharing options...
Science Abuse Posted February 27, 2005 Author Report Share Posted February 27, 2005 seems to me workingout, makes some of the stuff about 10 times more time consuming, though. tongue.gif Quote Link to comment Share on other sites More sharing options...
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