We know what the expected value of X is. It is equal to 16 ounces. In fact, they tell it to us on a box. They say, you know, net weight, 16 ounces. Now when you see that on a cereal box, it doesn't mean that every box is going to be exactly 16 ounces. Remember, you have a discrete number of these flakes in here. They might have slightly different densities, slightly different shapes, depending on how they get packed into this volume.