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. I don't know. Well, no, that's not a good one. Let's say it's people's heights above 5' 9".