So when you say it kind of verbally, it sounds very complicated. But you're just taking each number, what's the difference between that, the mean, square it, take the average of those. So I have 1, 2, 3, 4, 5. Divide by 5. So what is this going to be equal to? Negative 10 minus 10 is negative 20. Negative 20 squared is 400.