How can we put a number on it? How can we measure variability? This is a big aspect of statistics, but we won't do that in this video. There are future videos for doing that. But just as we go into the world of statistics, we should think about, well, when do we even, when should our brain even start getting into statistics mode? Thinking about the tools that we have at our disposal, about collecting data and measuring variability and measuring and finding numbers that somehow represent a data, a pool of data that has variability. And so the question we should ask ourselves is, what questions in the world are statistical questions?