You have 12 more that are less than 28. Then you have 12 more that are greater than 28. The median time for bus B would be 28. Once again, I just made this data up. If you took treatment group median, and I'll just write TGM for short, TGM minus control group median, what do you get? 20 minus 28 is negative eight. This is the actual results of, these are theoretical or potential results, hypothetical results, for her actual experiment.