How much does it change? And it's the same notion in statistics. In statistics, variability is the degree to which data points are different from each other, the degree to which they vary. And just as an example of that, to just make it a little bit more concrete, let's say you were to go to five people and you were to ask them, how many bricks did you eat yesterday? And each of the people say, well, you know, a person once said, I don't eat bricks at all. I don't even know how to do that. I ate zero bricks.