But anyway, just to digest this a little bit, and let me actually rewrite it. This is what you'll see on Wikipedia, but this could be rewritten as 1 over sigma times the square root of 2 pi times, exp is just e to that power, so it's just e to this whole thing over here, minus x minus the mean squared over 2 sigma squared. This is a standard deviation. Standard deviation squared is just the variance. And just so you know how to use this, you're like, oh wow, there's so many Greek letters here, what do I do? This tells you the height of the normal distribution function. Let's say that this is the distribution of people's, I don't know, how far north they live from my house or something.