And the rest of your life, if someone says, oh, we're assuming a normal distribution, you're like, oh, I know what that is. This is the formula, and I understand how to use it, et cetera, et cetera. So this spreadsheet, just so you know, is downloadable at www.khanacademy.org slash downloads slash, and if you just type that part in, you'll see everything that's downloadable. But then downloads slash normalintro.xls. And then you'll get this spreadsheet right here. And I think I did this in the right standard. But anyway, if you go on to Wikipedia, and if you were to type in normal distribution, or you were to do a search for normal distribution, let me actually get my pen tool going, this is what you would see.