Good Day, I have a problem that seems like it should be easy, but always seems to bring confusion to others as well and was hoping someone might be able to help. Usually when I first describe the problem people are "Oh, you just....." and they complete an answer then say, "But, wait...hmmmmm" afterwards giving me no confidence. Here's the problem:
I have 10 subjects, each performing 2 different activities 10 times. I am looking at the difference in maximum left foot-ground forces during running and during landing from a jump. So, I measure foot-ground forces for subject A 10 times while running and 10 times while landing from a jump. I want to know if the maximum measured forces are different between tasks. I've performed several studies in the past showing that foot-ground forces do not change as a function of trial. However, I need to collect 10 trials due to the variance that exists in foot-ground force measures. In the past, I have calculated the mean foot-ground force for each subject in each task, then just used a paired t-test. This seems reasonable, however while no one has ever told me this approach is incorrect, no one has told me it is correct. I basically just don't have much confidence in that approach. I would greatly appreciate either some confidence boosting or someone that can point me in a direction that might be a better approach for this problem. Thank you! Jeremy . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
