A sport psychologist wondered whether motivation could improve aerobic capacity. To answer the question, he measured 10 subjects on O2max (ml/kg/min) on a treadmill. Students were verbally instructed to do their very best. One week later, the subjects were measured again and were told they would receive $100 if their O2max was higher than it was the first time. a. Did the money cause them to significantly increase their O2max values