An experiment is conducted in which 60 participants each fill out a personality test, but not according to the way they see themselves. Instead, 20 are randomly assigned to fill it out according to the way they think a parent sees them (i.e. how a parent would fill it out to describe the participant); 20 as their best friend would fill it out for them; and 20 as the professors they know best would fill it out for them. The main results appear in the table below. Explain these results to a person who has not taken a course in statistics.