>Robert,
>
>Maybe I'm not too bright, but are "Normal ones" like - Bell Curve distributed
>or what, and what is the advantage of one over the other - or difference in
>usage?  In other words, why/when should/would we want to do that?
>
>Joe Wilkins

Joe, 

Yes, Normal distribution, Gaussian distribution and Bell Curve (as it is 
usually used) all refer to the same distribution. This distribution 
occurs in nature for many quantities that have some variability, a common 
example being heights of individuals. Sometimes one wants to simulate 
such variability in a set of data, and then uses the Normal distribution 
to do it.

     Robert Cogburn