It is not completely clear what question you are trying to answer or what you are trying to accomplish. But here are some additional questions that may help:
What tests would you use if you could use the original data? What assumptions are you willing to make about the data and/or statistics? What are you trying to accomplish? -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of soeren.vo...@eawag.ch > Sent: Wednesday, October 20, 2010 7:33 AM > To: r-help@r-project.org > Subject: [R] S: appropriate significance tests > > Hello > > (1) How can I compare two Pearson correlation coefficients for > significant differences without the use of the raw data? > > (2) How can I compare two linear regression coefficients for > significant differences without the use of the raw data? > > (3) How can I compare two multiple correlation coefficients (as > produced in a linear regression) for significant differences, again, if > the raw data should not be used? > > <src type="perhaps useful"> > da <- data.frame( > "y1"=sample(1:5, 40, repl=T), > "y2"=sample(1:5, 40, repl=T), > "x1"=sample(1:5, 40, repl=T), > "x2"=sample(1:5, 40, repl=T) > ) > cro1 <- cor(da$y1, da$x1) > cro2 <- cor(da$y2, da$x1) > lmo1 <- lm(y1 ~ x1 + x2, data=da) > lmo2 <- lm(y2 ~ x1 + x2, data=da) > </src> > > Thanks, Sören > > ______________________________________________ > 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. ______________________________________________ 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.
