So how would you do that? When I talk about the mean, when I talk about the mean, I'm talking about the arithmetic mean. If I were to talk about some other types of means, and there are other types of means, like the geometric mean, I would specify. But when people just say mean, they're usually talking about the arithmetic mean. So how would you go about finding the mean height of men in the United States? Well, the obvious one is, is well, you go and ask every, or measure every man in the United States, take their height, add them all together, and then divide by the number of men there are in the United States. But the question you need to ask yourself is whether that is practical.