Kan Liu wrote:
> Hello, > I got two sets of data > x=(124738, 128233, 85901, 33806, ...) > y=(25292, 21877, 45498, 63973, ....) > When I did a t test, I got two tail p-value = 0.117, which is not significantly different. > If I changed x, y to log scale, and re-do the t test, I got two tail p-value = 0.042, which is > significantly different. > Now I got confused which one is correct. Any help would be very appreciated. If you are unsure about the metric of the attribute being measured, it would be preferable to use a rank test, the Wilcoxon-Mann-Whitney, rather than the parametric t-test. ********************************************************** Cliff Lunneborg, Professor Emeritus, Statistics & Psychology, University of Washington, Seattle [EMAIL PROTECTED] ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
