Re: st: Why many things have Normal distribution

["Roger B. Newson" <r.newson@imperial.ac.uk>]

I would guess that it is because so many things are equal to the sum of 
a large number of weakly-dependent terms. Or, in the case of a lognormal 
distribution, so many things are equal to the product of a large number 
of weakly-dependent factors. I don't know how string theory comes into 
all this.
Best wishes

Roger

Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
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Email: r.newson@imperial.ac.uk
Web page: http://www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/

Opinions expressed are those of the author, not of the institution.

On 29/08/2013 19:27, Marcos Vinicius wrote:
> hello,
> Yesterday someone asked me a philosophical  question :Why many things have Normal distribution ( or at least approximately)?
> My answer: It is a type of symmetry we observe in nature..  maybe a String Theory specialist may have a technical answer.
> How do you answer that question?
> CLT maybe ?
>
> Regards,
> Vinicius
>
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