A Pharmaceutical that develops lotion that heal burns was interested in comparing theirNew (N) burn lotion with theOld (O) burn lotion in their effect on the speed of recovery from skin burns. To this end they took 20 recruited patients who had severe burns on both arms and randomly assigned which arm was to get lotionN and which arm was to get lotionO. Furthermore, the clinician who measured the heal time for each arm was not told which treatment each arm received.

1. What type of hypothesis test would you use regarding lotion and healing time? Why is this the right test? And what data do you use to conduct your hypothesis test?