On 6/10/2010 8:26 AM, Samuel Okoye wrote: > Hello, > > Is there any R function which does power calculation for unbalanced groups > (n1 neq n2)? Since power.t.test has n > > Number of observations (per group). > > Many thanks, > Samuel
See pwr.t2n.test() in the pwr package. http://finzi.psych.upenn.edu/R/library/pwr/html/pwr.t2n.test.html You might have found it by doing the following in R: RSiteSearch("power analysis", restrict='function') > [[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. -- Chuck Cleland, Ph.D. NDRI, Inc. (www.ndri.org) 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 512-0171 (M, W, F) fax: (917) 438-0894 ______________________________________________ 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.
