Hi, I am trying to estimate the sample size needed for the comparison of two groups on a certain measurement, given some previous data at hand. I find that the data collected does not follow a normal distribution, so I would like to use a non-parametric option for sample size calculation.
I found the pwr package but I don't think it has this option and on the internet found that http://www.epibiostat.ucsf.edu/biostat/sampsize.html says only PASS allows non-parametric sample size calculations (although the webpage is not updated). Any help would be greatly appreciated Thanks, Dave [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org 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.
