It has some very neat properties, which is why the way we've defined it as the mean of the squared distances from the mean tends to be a useful way of doing it. So let's just do that. Let's actually calculate the population variance for this population right over here. Well, all we need to do is find the distance from each of these points to our mean right over here, and then square them and then take the mean of those squared distances. So let's do that. So it's going to be 4 minus 4.6 squared plus 4.2 minus 4.6 squared plus 5 minus 4.6 squared plus 4.3 minus 4.6 squared. And then finally, I'm running out of space, plus 5.5 minus 4.6 squared.