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. And then you can also calculate your sample standard deviation. Find the square distance from each of these points to your sample mean, add them up, divide by n minus 1 because it's a sample, then take the square root, and you get your sample standard deviation. And I did this ahead of time just to save time.