We've just been dealing with them in the abstract right now. But you can imagine that these are kind of the results of some type of experiment. Let's say that I gave 3 different types of pills, or 3 different types of food, to people taking a test. And these are the scores on the test. So this is food 1, this is food 1, this is food 2, this is food 2, and then this right over here is food 3. And I want to figure out if the type of food that people take going into the test, does it really affect their scores? Are the differences in these scores, if you look at these means, it looks like they perform best in group 3, then in group 2, or then in group 1.