Two short notes--
1. I recommend that everyone go and look at this strip from xkcd. If you've EVER had to do any statistical analysis, it'll totally make sense.
2. I'd also like to recommend a free game to all of you called God's Sandbox. Hope over to http://www.vertigogaming.net/index.php and download it. You get a set of miracles/plagues to cast upon the earth in each of several eras and the order you pick changes the results. You can make volcanoes or rabbit-men or nuclear war. You decide.
It's a simple game, but the idea is you keep going back and trying again (on different planets? Lol.) to accumulate all of the possible outcomes on your checklist. 7 rounds later, I've got about half of them.