I'm looking for a couple of unit tests for Ruby's random number generator. Unfortunately, what stat's I did is now all a blur (largely because I skipped the courses, but...) So, my thinking is to do a T-test on the mean, and a Kolmorogov-Smirnov on the distribution. Is this a good approach, or can I do better. And if I take this approach, what would be reasonable confidence values? I had a look at the diehard tests, but I don't want to go to town on this--I just want a couple of sanity checks. Thanks Dave