What I want to do is say, so my question here is, are the true population means the same? So if the true population means, this is a sample mean just based on 3 samples, but if I knew the true population means, so my question is, is the mean of the population of people taking food 1 equal to the mean of food 2? Obviously I'll never be able to give that food to every human being that could ever live and then make them all take an exam, but we're trying to get a sense of, there is some true mean there, it's just not really measurable. So my question is, this equal to this equal to the mean 3, the true population mean 3. And my question is, are these equal? It's because if they're not equal, then that means that the food, that the food actually, the different foods that you get, actually do have some type of impact on how people perform on a test. So let's do a little bit of a hypothesis test here.