[R] Inferences for ratios of non-normal means
Robert A LaBudde
ral at lcfltd.com
Wed Sep 12 04:10:04 CEST 2007
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.
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 <phhs80 at gmail.com> 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
> >
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================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral at lcfltd.com
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