Not particularly R related, but r related. For pearson correlation, the test statistics is based on t distribution.
ts = r * sqrt ((n-2)/(1-r^2)) with n-2 degree of freedom. I think you can solve this question, maybe a little bit of googling. On Jan 14, 2008 1:39 PM, Sanglamt <[EMAIL PROTECTED]> wrote: > > I've spent several hours trying to track the answer down myself and failed > miserably so a simple question for everyone that will no doubt have a > painfully obvious answer. > > What's the command to calculate the critical value of r using a two tailed > test with a given alpha and degrees of freedom? I.e., alpha=0.05, df=18, > two-tailed test, with the result being 0.4438 > -- > View this message in context: > http://www.nabble.com/Critical-values-of-r-tp14795700p14795700.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. > -- CH Chan Research Assistant - KWH http://www.macgrass.com ______________________________________________ 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.
