I am trying to analyze some data I collected from an experiment. I asked 18 subjects to run 20 meters three times at 7:33 pace using a different methods each time and I recorded their times. I now have the data in the form of the difference between the time it took the participant to run the 20 meters and the time they should have taken to run at 7:33 pace. I would like to use a statistics test to compare the mean differences (comparing pacing method 1 to pacing method 2 and pacing method 3 to pacing method 2). Originally I used a 2 sample T-test, but I have since realized that in order to run that test the 2 groups need to be independent. Should I use a 2 sample paired T-test instead?