And if we want to put some units there, it's 4.6 meters. Now, that's the central tendency or a measure of central tendency. We also might be curious about how dispersed is the data, especially from that central tendency. So what would we use? Well, we already have a tool at our disposal, the population variance. And the population variance is one of many ways of measuring dispersion. 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.