Homework? There's a no homework policy on this list. -- Bert
On Mon, Oct 1, 2012 at 8:10 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > Perhaps you should read > > ?dhyper > > and if you have a hard time parsing that, then read > > ?Distributions > > and then go back to > > ?dhyper > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > jas4710 <wata...@post.com> wrote: > >> >>I'm going to use >> >>dhyper(x, m, n, k) >> >>to get a 95% coverage. Let me use an example to explain my problem: >> >>Suppose I have a urn containing 90 red and 10 black balls. >>Now I wanna remove 3 from the urn. By the following codes: >> >>m<-90;n<-10;k<-3; >>x<-0:3 >>dhyper(x,m,n,k) >> >>I can obtain the probability that 0,1,2,3 red balls will be removed. >> 0.000742115 0.025046382 0.247680891 0.726530612 >> >>So >95% time, 2 to 3 red balls will be removed and the resultant >>composition >>will be changed to >>87:10 or 88:9, the original percent of red balls will be changed from >>90 to >>89.69 to 90.72 then. >> >>If now I have 50:50 and again to remove 3 balls, I will obtain the >>probability as: >>0.1212 0.3788 0.3788 0.1212 >> >>To get the resultant range of red balls for >95% time, this time all >>the >>four cases have to consider and so the resultant change of red balls >>will >>become 48.45 to 51.54 >> >>So my problem is, is there any convenient built-in function that helps >>extract this 95% confidence interval-like data? >> >> >> >> >> >> >>-- >>View this message in context: >>http://r.789695.n4.nabble.com/Retrieve-hypergeometric-results-in-large-scale-tp4644683.html >>Sent from the R help mailing list archive at Nabble.com. >> >>______________________________________________ >>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. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ 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.