Message-ID: <26404934.post@talk.nabble.com>
Date: 2009-11-18T09:41:56Z
From: Krusty the Klown
Subject: (exact) confidence bounds for lognormal parameters \mu and \sigma
In-Reply-To: <4B02F987.9060206@auckland.ac.nz>
Thank you,
it is what I was looking for:
library(fitdistrplus)
x<-rlnorm(100)
res<-mledist(x, distr="lnorm")
res
Anyway, the results do not provide confidence intervals, but mle estimates
and the hessian matrix, whose extradiagonal elements are null... is it
correct?
http://www.weibull.com/LifeDataWeb/confidence_bounds_log.htm
http://www.weibull.com/LifeDataWeb/confidence_bounds_log.htm
I will investigate...
David Scott-6 wrote:
>
> Krusty the Klown wrote:
>> Dear all,
>> a statistical question: how can I compute exact confidence intervals for
>> the
>> lognormal distribution parameters? I found something only on
>> www.weibull.com www.weibull.com . Does exist a package in R which can
>> compute them?
>> Thanks in advance,
>> KTK
>
> I think fitdistrplus can do this
>
> David Scott
> --
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> The University of Auckland, PB 92019
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> Email: d.scott at auckland.ac.nz, Fax: +64 9 373 7018
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