But the simplest way to think about it is really, truly independent data points, assuming you knew, in this case, the central statistic that we use to calculate the squared distance in each of them. If you know them already, the third data point could actually be calculated from the other two. So we have 6 degrees of freedom over here. Now, that was how much of the total variation is due to variation within each sample. Now let's think about how much of the variation is due to variation between the samples. And to do that, we're going to calculate. Let me get a nice color here.