Hi You need to use paired option
> t.test(x=0:4, y=sample(5:9), paired=TRUE)$estimate mean difference -5 Cheers Petr > -----Original Message----- > From: R-help <r-help-boun...@r-project.org> On Behalf Of Samuel Granjeaud > IR/Inserm > Sent: Sunday, April 2, 2023 11:39 PM > To: r-help@r-project.org > Subject: [R] Should help of estimate in t.test be corrected? > > Hi, > > Not important, but IMHO the estimate component of the t.test holds an > estimate of mean of each group, never a difference. The doc says > "estimate the estimated mean or difference in means depending on whether > it > was a one-sample test or a two-sample test." > > > t.test(0:4)$estimate > mean of x > 2 > > t.test(0:4, 5:9)$estimate > mean of x mean of y > 2 7 > > Best, > Samuel > > ______________________________________________ > 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.
______________________________________________ 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.