Paul, On 9/11/07, JRG <[EMAIL PROTECTED]> wrote: > On 11 Sep 2007 at 22:10, Robert A LaBudde wrote: > > > I think a ratio of two normals has a Cauchy distribution, which > > doesn't have a variance (the singularity in the denominator), so the > > Central Limit theorem does not apply. > > > > The Cauchy results if the denominator normal distribution has mean = 0, but > noth otherwise. > > > > > > > I would suggest using bootstrap resampling to make inferences. > > > > At 08:10 PM 9/11/2007, Moshe wrote: > > >For large samples you have asymptotic normality! > > > > > >--- Paul Smith <[EMAIL PROTECTED]> wrote: > > > > > > > Dear All, > > > > > > > > The package mratios can perform inferences for > > > > ratios of normal means. > > > > Is there some other package to do the same but with > > > > non-normal > > > > populations. Since I have got large samples, an > > > > asymptotic procedure > > > > would be fine. > > > > > > > > Thanks in advance, > > > > > > > > Paul > > > > > > > > ================================================================ > > Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: [EMAIL PROTECTED] > > Least Cost Formulations, Ltd. URL: http://lcfltd.com/ > > 824 Timberlake Drive Tel: 757-467-0954 > > Virginia Beach, VA 23464-3239 Fax: 757-467-2947 > > > > "Vere scire est per causas scire" > > > > ______________________________________________ > > > John R. Gleason > > Syracuse University > 430 Huntington Hall Voice: 315-443-3107 > Syracuse, NY 13244-2340 USA FAX: 315-443-4085 > > PGP public key at keyservers >
Also, in case you missed it, do library(boot) help(boot) # see first example re. ratio of means ______________________________________________ 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.
