All right. Then they tell us, the results, this is important, the results of the experiment show that the median travel duration for bus A is eight minutes less than the median travel duration for bus B. Or one way to think about it, if we said the treatment group median minus the control group median, what would we get? Well, the treatment group is eight minutes less than the control group. This is A, this is B. If this is eight less than this, then this is going to be equal to negative eight. This is just another way of restating what I have underlined right over here.