I got an answer for the other question (thank you) But there is another question (I am afraid this is a basic question ...)
In this tread there is a hint hwo to calculate the p-vlue of an GEE: > _http://finzi.psych.upenn.edu/R/Rhelp02a/archive/74150.html_ > > Then, get the P values using a normal approximation for the > distribution of z: > > /> 2 * pnorm(abs(coef(summary(fm1))[,5]), lower.tail = FALSE) / > (Intercept) TPTLD 0.00000000 0.04190831 1. why is the result multiplicated with 2? There is a P-value between 1 and 2 with the results below and multiplicated with 2: 2*pnorm(c(1.8691945,0.5882351,2.4903091,1.9287802,2.3172983,2.2092593,2.2625959,1.6395695), lower.tail =TRUE) Regards Carmen ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
