> I have created two random samples of size 20 each and would like to
> combine them into one sample of size 40. Is this possible? Thanks.

> Yes it's possible, but it would help if you describe what you want to
> achieve. For example, why you cannot draw the size-40 set in one go.

sven,

I am drawing the two samples from different sub-sets -  each sub-set was conditioned on a different dummy variable i.e. they are different populations from which I am drawing a sample.

George