<markleeds <at> verizon.net> writes:
> > by definition, the one tailed p-value has to be <= 0.5 so there is > still something wrong with your OpenEpi calc. Most likely it's > calculating the > 2 tailed p-value and then mistakenly multiplying by 2. For example: For what it's worth, Fisher's exact test with alternative="greater" (true odds ratio is > 1) does give 0.6273 in R. (Why does a one-tailed test have to have p<=0.5? The probability that a test statistic is greater than some null-hypothesis value can be anywhere between 0 and 1 ...) It is a 1-tailed test, but (as has been pointed out) multiplying it by 2 without truncating at 1 is wrong. Ben Bolker ______________________________________________ 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.
