[R] One Sample Nonparametric
Hi! I'm doing one and two sample nonparametric tests for the median using wilcox test. For a one-sample test I use: > wilcox.test(x, mu =50 (or whatever), y=NULL,correct=TRUE) For two-sample test I use: > wilcox.test(x,y,correct=TRUE) The problem is when I try to duplicate problems from textbooks, I get p-values that are much different from the examples from the literature. They are off by as much as 30% to 40%. Not even close. Using an "exact" argument doesn't change the p-value. What am I doing wrong? Thanks for any help. cvandy   Charles H Van deZande [[alternative HTML version deleted]] __ 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.
Re: [R] One Sample Nonparametric
Charles Van deZande gmail.com> writes: > I'm doing one and two sample nonparametric tests for the median using wilcox > test. For a one-sample test I use: > > wilcox.test(x, mu =50 (or whatever), y=NULL,correct=TRUE) > For two-sample test I use: > > wilcox.test(x,y,correct=TRUE) > The problem is when I try to duplicate problems from textbooks, I get > p-values that are much different from the examples from the literature. > They are off by as much as 30% to 40%. Not even close. > Using an "exact" argument doesn't change the p-value. > What am I doing wrong? You have not posted the textbook example you tested. You can use dput to compactly post the data samples. Also check package coin. Dieter __ 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.
