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Pearson's chi square goodness of fit test - using R

G test

The R code below does a G-test from first principles. To obtain the code for a more general log-likelihood test function goto

Gives something like this:

> (G =2*sum(of*log(of/ef))) # observed value of G [1] 66.64209 > (df =k-1-2) # degrees of freedom [1] 18 > 1-pchisq(G,df) # P-value [1] 1.657333e-07