Sorry, but in your original post you said that " Null Hypothesis (H0) is that the error produces by model A is not lower than model B". If now is that model A produces less error change to alternative="less". The relevant part in the help page ?t.test is
alternative = "greater" is the alternative that x has a larger mean than y. Rui Barradas Citando Eliza Botto <eliza_bo...@outlook.com>: > Thnx Rui, > Just one point though > > Should it be alternative="greater" or "less"? Since alternative > hypothesis is that model A produced less error. > > regards, > > Eliza > > ------------------------- > Date: Wed, 23 Mar 2016 20:44:20 +0000 > From: ruipbarra...@sapo.pt > To: eliza_bo...@outlook.com > CC: r-help@r-project.org > Subject: Re: [R] test hypothesis in R > Dear All, > I want to test a hypothesis in R by using student' t-test (P-values). > The hypothesis is that model A produces lesser error than model B at > ten stations. Obviously, Null Hypothesis (H0) is that the error > produces by model A is not lower than model B. > The error magnitudes are > > #model A >> dput(mA) > > c(36.1956086452583, 34.9996207622861, 36.435733025221, > 37.2003157636202, 36.1318687775115, 37.164132533536, > 35.2028759357069, 36.7719835944373, 38.3861425339751, > 37.4174132119744) > #model B >> dput(mB) > > c(39.7655211768704, 40.1730916643841, 39.3699055738618, > 39.401619831763, 41.1218634441457, 39.1968630742826, > 40.5265825061639, 40.4674956975404, 40.5954427072364, > 41.4875529130543) > > Now can I test my hypothesis in R? > Thankyou very much in Advance, > Eliza > [[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.htmland provide commented, > minimal, self-contained, reproducible code. [[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.
