While many students should be comfortable with the arithmetic mean or "simple average," the geometric average may be unfamiliar to some students. What's the difference between the arithmetic average and the geometric average? Which one is better to evaluate as  While many students should be comfortable with the arithmetic mean or "simple average," the geometric average may be unfamiliar to some students. What's the difference between the arithmetic average and the geometric average? Which one is better to evaluate asset average returns?set average returns?