7 minus 6 is 1, squared is 1. So that's 2 over here. So this is going to be equal to, our sum of squares within, I should say, is 6. So one way to think about it, our total variation was 30. And based on this calculation, 6 of that 30 comes from variation within these samples. Now the next thing I want to think about is, how many degrees of freedom do we have in this calculation? How many kind of independent data points do we actually have?