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. I literally copied and pasted this right here from Wikipedia. And I know it looks daunting. You have all these Greek letters there. But this is just the sigma right here. That is just the standard deviation of the distribution. We'll play with that a little bit in this chart and see what that means.