Dear List, does anyone know how I can test the strength of a correlation? Cheers, Anna
Hi Anna, Take a look at ?cor ?cor.test and http://www.statmethods.net/stats/power.html HTH, Jorge On Sat, Mar 5, 2011 at 3:02 PM, Anna Gretschel <> wrote:> Dear List, > > does anyone know how I can test the strength of a correlation? > > Cheers, Anna > > ______________________________________________ > 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. >[[alternative HTML version deleted]]
Can you clarify what you mean? The strength of the correlation is the correlation. One (somewhat) useful definition is Cohen's, who said 0.1 is small, 0.3 is medium and 0.5 is large. Or do you (as your subject says) want to get the power for a correlation? This is a different thing. Jeremy On 5 March 2011 12:02, Anna Gretschel <ana-lee at web.de> wrote:> Dear List, > > does anyone know how I can test the strength of a correlation? > > Cheers, Anna > > ______________________________________________ > 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. >-- Jeremy Miles Psychology Research Methods Wiki: www.researchmethodsinpsychology.com