There is a difference. And so in this context, the no difference, we would say the null hypothesis would be we would care about the population parameter, and here we care about the average amount of drink dispensed in the medium setting. So the population parameter there would be the mean, and that the mean would be equal to 530 milliliters because that's what the drink machine is supposed to do. And then the alternative hypothesis, this is what the owner fears, is that the mean actually might be larger than that, larger than 530 milliliters. And so let's see, which of these choices is this? Well, these first two choices are talking about proportion, but it's really the average amount that we're talking about. We see it up here.