So this is a population distribution. This is the population distribution. And we don't know anything really about it outside of the sample that we have here. Now, what we can do is, and this tends to be a good thing to do when you do have a sample, is just figure out everything that you can figure out about that sample from the get go. So we have our seven data points. And you can add them up and divide by 7 and get your sample mean. So our sample mean here is 2.34.