[R] chi2

Alberto Monteiro albmont at centroin.com.br
Wed Oct 10 13:55:52 CEST 2007


Oops... Check...
http://en.wikipedia.org/wiki/Chi-square_distribution

The Chi-square distribution for _any_ df has
mean = df and variance = 2df, so for large df, it's
approximately a normal distribution with mean = df and
sd = sqrt(2 df) [and not sqrt(df) as I wrote in a previous
message that, probably, will appear after this one - Murphy
rulez]

Alberto Monteiro



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