By changing the value of one score in a sample this will necessarily cause the mode to change

Research has found that when they injure themselves, most self-mutilators:

A) immediately regret it. B) feel little or no pain. C) tell or show a trusted friend. D) all of the above

The best or most typical model of a concept is called a(n) ______

a. prototype c. image b. exclusive representation d. phoneme