So when we're seeing in general, there's variation in what the gas mileage is at 55 miles an hour and at 70 miles an hour. So what you'd probably want to do is say, well, what's my average mileage when I drive at 55 miles an hour? And compare that to the average mileage when I drive at 70. So because we have this variability in each of those cases, this is definitely a statistical question. Do English professors get paid less than math professors? So once again, all English professors don't get paid the same amount, and all math professors don't get paid the same amount. Some English professors might do quite well.