So I won't be able to exactly figure out what these parameters are going to be, what my mean is, what P is going to be. But instead of doing that, what I'm going to do is do a random survey. I'm going to sample this population, look at that data, and then get an estimate of what P really is. Because this is what I really care about. I really care about P. So I'm going to try to estimate P with a sample. And then we're also going to think about how good of an estimate that is. So let's say I am going to randomly survey 100 people.