Blurb::
First parameter of the lognormal distribution (options 1 & 2)
Description::
For the lognormal variables, one may specify either the mean 
\f$\mu\f$
and standard deviation 
\f$\sigma\f$ 
of the actual lognormal distribution, the mean 
\f$\mu\f$
 and error factor 
\f$\epsilon\f$ 
of the actual lognormal distribution.

This corresponds to the mean of the lognormal random variable
Topics::	
Examples::
Theory::
Faq::
See_Also::	
