
Re: log normal?
Posted:
Dec 27, 2012 2:09 AM


In article <83a604c5c4214ea290f1a27942ee5fa6@n2g2000pbp.googlegroups.com>, RichD <r_delaney2001@yahoo.com> writes:
> Ocasionally I come across somethign called log > normal, and I wonder, what is the purpose? > The normal distribution is natural, but the log of that, > seems unnatural, and unintuitive. > > Can anyone elaborate on its use?
Basically, the normal distribution is natural for additive processes. Add n uniformdeviate random numbers together m times, make a histogram and you get the Gaussian, i.e. normal, distribution. The log normal distribution is the equivalent for processes which are not additive but multiplicative.

