Power of t test for unequal variances?
Gerrit, thanks for the suggestion. ?samplesize::n.ttest does seem to handle unequal variances.
On Tuesday, December 20, 2016 2:55 AM, Gerrit Eichner <Gerrit.Eichner at math.uni-giessen.de> wrote:
Hello, Mauricio, maybe pwr.t2n.test() in package pwr or/and n.ttest() in package?samplesize do what you need/want. ? Hth? --? Gerrit
On Dec 19, 2016, at 1:47 PM, Mauricio Cornejo via R-help <r-help at r-project.org> wrote: Is there a function similar to stats::power.t.test that can handle unequal variances from two samples? I noticed that stats::t.test has an argument for indicating whether or not to treat the two sample variances as equal.? Wondering why stats::power.t.test doesn?t have that option. Thanks, Mauricio