On Mon, Mar 30, 2009 at 7:54 PM, hadley wickham <[email protected]> wrote: >> The source directory of my slides for Peter's book, "Introductory >> Statistics with R", is available as >> >> http://www.stat.wisc.edu/~bates/ISwR.zip
> Those are really nice. Thanks. I'll get the set for the Cohen and Cohen book up after I clear off some disk space. > I see you still teach t-tests and the Wilcoxon signed-rank test - is > this just an artefact of following Dalgaard, or do you have a > preference for them over the (computational expensive but conceptually > simpler) permutation tests? The nonparametric tests are there because they are described in Peter's text. I skip them in my classes. I tend to use t-tests after examining normal probability plots and, possibly, considering transformation. I believe they would be more powerful than permutation tests but that may be incorrect. Can you describe situations in which you would prefer permutation tests to t-tests? >> (I'm sorry, Hadley, but I use lattice throughout. I haven't taken the >> time to learn ggplot2.) > No problems. I don't think there's much difference in capabilities at > this level. _______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
