What does this have to do with R?

Post on a statistical list (like stats.stackexchange.com).

I would urge respondents here to reply privately.

-- Bert

On Wed, Dec 19, 2012 at 1:08 PM, Zhiqiu Hu <zhiqiu...@gmail.com> wrote:

> Respected R Users,
>
> I looking for help with generating theoretical confidence regions for any
> of non-symmetric bivariate statistical distributions (bivariate Chi-squared
> distribution<Wishart distribution>, bivariate F-distribution, or any of the
> others). I want to to used it as a benchmark to compare a few strategies
> constructing confidence regions for non-symmetric bivariate data.
>
> There is a paper proposed an accumulative function for bivaraite
> F-Distribution, but it was basically oriented for "one-tail" testing. I
> understand that it is nonsense to consider two-tails of F or Chi^2
> distribution in most cases. But we may still need to know the confidence
> intervals of a estimate following the distributions in some situations.
> Thereby, please forget the necessity of the question itself.  In one word,
> my question is: for two variables x and y, which are following chi^2
> distributions (df=4), independently, what is the theoretical confidence
> region of the joint distribution of x,y for a given alpha? Since the issues
> has already beyond my research area, please let me know if my descriptions
> are confusing. Numeric strategies are also welcomed for the issue.
>
> I appropriate your kindly help with the matter.
>
> Best regards,
>
> Zhiqiu
>
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>
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-- 

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

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