Drexel dragonThe Math ForumDonate to the Math Forum


Math Forum
 Ask Dr. Math
 Discussions
 Internet Newsletter
 MathTools
 Problems of the Week
 Teacher2Teacher
 Teacher Exchange
 Workshops

Search All of the Math Forum:
Browse our Internet Mathematics Library

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math.num-analysis.independent

Topic: log normal?
Replies: 10   Last Post: Jan 1, 2013 6:17 AM

Advanced Search
Reply to this Topic Reply to this Topic

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
David Jones

Posts: 54
Registered: 2/9/12
Re: log normal?
Posted: Dec 27, 2012 6:11 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply



"RichD" wrote in message
news:83a604c5-c421-4ea2-90f1-a27942ee5fa6@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.

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2013. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.