That they're really independent. Given that, we can then at least try using the skills we have to model out some type of a distribution. The first thing you do, and I'd recommend doing this for any distribution, is maybe we can estimate the mean. Let's sit out on that curb and measure what this variable is over a bunch of hours and then average it up. And that's going to be a pretty good estimator for the actual mean of our population, or since it's a random variable, the expected value of this random variable. Let's say you do that and you get your best estimate of the expected value of this random variable is, I'll use the letter lambda. So this could be 9 cars per hour.