So each x sub i. And from it, we're subtracting the sample mean. And then we're squaring it. We're taking the sum of the squared distances. And then we're dividing not by the number of data points we have, but by 1 less than the number of data points we have. So this calculation, where we summed up all of this, and then we divided by 5, not by 6, this is the standard definition of sample variance. So I'll leave you there.