
Re: log normal?
Posted:
Dec 27, 2012 6:11 AM


"RichD" wrote in message news:83a604c5c4214ea290f1a27942ee5fa6@n2g2000pbp.googlegroups.com...
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?
 Rich

It is not "log of that", it is the "exponential of that" ... that is, a lognormal rv is the exponential of a normal rv.
If an observation has a lognormal distribution, the logarithm of the observation has a normal distribution.

