And I'm going to do that by calculating the mean absolute deviation. So pause this video now. Try to calculate the mean of the number of bubbles blown. And then after you do that, see if you can calculate the mean absolute deviation. All right, so step one, let's figure out the mean. So the mean is just going to be the sum of the number of bubbles blown divided by the number of data points. So Manuela blew four bubbles.