The example is the example in the documentation for the method. There were no details. https://www.rdocumentation.org/packages/stats/versions/3.6.2/topics/prop.trend.test More documentation would be useful. Answering questions like what are these numbers?
As shown, I see a cluster of three values in the 70-90 and an outlier at 129. The pattern repeats for patients, with very slightly different numbers. Is the outlier real or a data error? Are these values real or just some values stuffed into an example to show that I can get numbers back out? Tim -----Original Message----- From: R-help <r-help-boun...@r-project.org> On Behalf Of Michael Dewey Sent: Thursday, September 7, 2023 11:52 AM To: Thomas Subia <tgs...@yahoo.com>; R. Mailing List <r-help@r-project.org> Subject: Re: [R] prop.trend.test [External Email] Dear Thomas Are you looking for more than smokers / patients Michael On 07/09/2023 14:23, Thomas Subia via R-help wrote: > > Colleagues > > Consider > smokers <- c( 83, 90, 129, 70 ) > patients <- c( 86, 93, 136, 82 ) > > prop.trend.test(smokers, patients) > > Output: > > Chi-squared Test for Trend inProportions > > data: smokers out of patients , > > using scores: 1 2 3 4 > > X-squared = 8.2249, df = 1, p-value = 0.004132 > > # trend test for proportions indicates proportions aretrending. > > How does one identify the direction of trending? > # prop.test indicates that the proportions are unequal but doeslittle to > indicate trend direction. > All the best, > Thomas Subia > > > [[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. > -- Michael http://www.dewey.myzen.co.uk/home.html ______________________________________________ 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.