2 x 2 Contingency Tables and Type II Error
Hello, See package pwr, function pwr.chisq.test() See also http://www.statmethods.net/stats/power.html Hope this helps, Rui Barradas Em 02-12-2012 18:21, Lorenzo Isella escreveu:
Dear All, I am struggling with a the calculation of the type II error (i.e. what leads to the statistical power) for a 2 x 2 contingency table. I see that R can easily accomplish a lot with the chi-square on a contingency table http://bit.ly/VeCrxP but I do not find an indication for the probability of accepting the null hypothesis when it is false. Am I missing the obvious? Many thanks Lorenzo
______________________________________________ R-help at 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.