Hi Michael, Thank you for your reply! I'm testing the difference in proportions. Temp is temperature, and Prop is the proportion of insect pupae that survived at that temperature. I was told by a statistician that the K-W was appropriate for testing proportions, but perhaps you know of an alternative? I have already tested for heteroscedasticity using the Breusch-Pagan test.
Thanks again, Jenny On Dec 22, 2018 7:38 AM, "Michael Dewey" <li...@dewey.myzen.co.uk> wrote: Dear Jenny What exactly do you think you are testing here? You are telling K-W you have seven groups each with a single value which is not the usual situation for K-W. Michael On 22/12/2018 04:58, Jenny Liu wrote: > Hi everyone, > I have been running a K-W test with the attached data, PupMort1. My code: > kruskal.test(Prop~Temp,data=PupMort1) > However, I found that I get the exact same result when I change the x-values, as > in the attached data PupMort2. > Test run with PupMort1Kruskal-Wallis rank sum testdata: Prop by Temp > Kruskal-Wallis chi-squared = 6, df = 6, p-value = 0.4232 > Test run with PupMort2Kruskal-Wallis rank sum testdata: Prop by Temp > Kruskal-Wallis chi-squared = 6, df = 6, p-value = 0.4232 > Does anybody know why this is happening? > Thank you! > Jenny > > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > -- Michael http://www.dewey.myzen.co.uk/home.html [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
