Then look at that package I referred in the other e-mail. It does exactly what you need - I am just not sure if it's still available. The author's e-mail is there, though - you can ask. Good luck. Dimitri
On Sat, Oct 30, 2010 at 5:04 PM, Alex Bokov <bo...@uthscsa.edu> wrote: > > > On 10/30/2010 03:34 PM, Dimitri Liakhovitski wrote: >> >> You are asking a statistics question, not an R question. R-list people >> never react to such posts. >> Or they give you a nasty reply of the type: "Do you homework first, >> and then ask questions here." >> > > Good point. I thought it was an R question because it was about confirming > what the output of an R function actually represents, and it is not > explicitly documented in the help file. I was about 80% sure that it is what > you just confirmed it to be in your answer, but I didn't want to yet again > make an assumption about the behavior of this software that I'd have to > retract later. I am going to hold on to my assumption that no multiple > comparison corrections were done and it's up to me to do that. >> >> Each of the t tests for b:c2, b:c3, and b:c4 test the null hypotheses: >> difference in slopes of a onto b between groups scored c2 (or c3 or >> c4) and the group scored c1 is equal to zero. > > Yes! This is precisely the hypothesis I'm testing at the moment. >> >> The package I refered to seems to be what you want. >> > > Thank you, I will look into that because most of the time I really do need > to do pairwise tests of all combinations. Just not this time. > > ______________________________________________ > 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. > -- Dimitri Liakhovitski Ninah Consulting www.ninah.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.
