Thank you David I think that makes sense. As a side note I have been doing some work with fish abundance in aquaria. The TRUE column is the actual amount of fish in the tank, so a questionable practice but a valid one??
Thanks again, Stephen On 25 Nov 2012, at 20:41, David Winsemius [via R] wrote: > > On Nov 25, 2012, at 4:55 AM, sm2284 wrote: > > > Dear R-ers, > > > > I am currently running some Wilcoxon tests in R-64. > > > > How do I find the degrees of freedom in the output I am receiving? > > > >> wilcox.test(good$TRUE, good$x4a, paired=FALSE) > > > > Wilcoxon rank sum test with continuity correction > > > > data: good$TRUE and good$x4a > > W = 2455, p-value < 2.2e-16 > > alternative hypothesis: true location shift is not equal to 0 > > > When using wilcox.test with two samples, the function passes some > version of the Rank-Sum statistic W to the pwilcox function followed > by the lengths of the two vectors. So I suppose you could say the > sample sizes are the "degrees of freedom". Reasoning informally I > would think the smaller of those lengths would be the most important > in determining stability of the inference. > > BTW, methinks it a very questionable practice to name a column 'TRUE'. > > -- > David Winsemius, MD > Alameda, CA, USA > > ______________________________________________ > [hidden email] 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. > > > If you reply to this email, your message will be added to the discussion > below: > http://r.789695.n4.nabble.com/Finding-the-Degrees-of-Freedom-in-a-Wilcoxon-Test-tp4650724p4650775.html > To unsubscribe from Finding the Degrees of Freedom in a Wilcoxon Test, click > here. > NAML Stephen James McKelvie sjmckel...@gmail.com ----- University of St Andrews, sm2...@st-andrews.ac.uk -- View this message in context: http://r.789695.n4.nabble.com/Finding-the-Degrees-of-Freedom-in-a-Wilcoxon-Test-tp4650724p4650783.html Sent from the R help mailing list archive at Nabble.com. [[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.
