Two variables are said to be negatively associated if
(a) above-average values of one variable tend to accompany above-average values of the other.
(b) above-average values of one variable tend to accompany below-average values of the other.
(c) below-average values of one variable tend to accompany below-average values of the other.
(d) below-average values of one variable can be accompanied by either above-average or below-average values of the other.
(e) none of the above