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. So let's say that my null hypothesis, let's say that my null hypothesis is that the means are the same, or food doesn't make a difference. Food doesn't make a difference. The food doesn't make a difference, but my alternate hypothesis is that it does.