So let me get 25 plus 9 plus 1 plus 1 plus 64 divided by 5. So I get 20. So the average squared distance, or the mean squared distance from our population mean is equal to 20. And you might say, wait, these things aren't 20. Remember, it's the squared distance away from my population mean. So I squared each of these things. I liked it because it made it positive.