Viju Moses, Are you sure you got a P-value of 1.25 ? Since P-value could only be between 0 to 1...
Tal On Sat, Mar 21, 2009 at 9:17 PM, Viju Moses <vijumo...@gmail.com> wrote: > Hi, I noted a discrepancy between R and openepi when I ran a fisher test > with the same matrix. In R: > > > a=matrix(c(1,2,6,17), nrow=2) > > a > [,1] [,2] > [1,] 1 6 > [2,] 2 17 > > fisher.test(a, conf.int=T) > > Fisher's Exact Test for Count Data > > data: a > p-value = 1 > alternative hypothesis: true odds ratio is not equal to 1 > 95 percent confidence interval: > 0.02061498 31.73691924 > sample estimates: > odds ratio > 1.396646 > > But in openepi the P value is 1.25. (In another instance too for other sets > of data, I had got a p value of 1 in 3 instances for a prop.test when I got > 3 other answers on a friend's stata software with the same data. ) > > I'm using R on Ubuntu Intrepid. Is there anything I'm doing wrong? Any > other packages I have to install? > > Thanks in advance > > Viju Moses > > ______________________________________________ > 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. > -- ---------------------------------------------- My contact information: Tal Galili Phone number: 972-50-3373767 FaceBook: Tal Galili My Blogs: http://www.r-statistics.com/ http://www.talgalili.com http://www.biostatistics.co.il [[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.
