A student wonders if people of similar heights tend to date each other. She measures herself, her roommate, and the women in adjoining rooms; then she measures the next man each woman dates. Here are the data (heights in inches):
Women 66 64 66 65 70 65
Men 72 68 70 68 74 69
Sketch a scatterplot of this data and then decide which of the following statements is true:
a. The variables measured are all categorical.
b. There is a strong negative association between the heights of men and women, because the women are always smaller than the men they date.
c. There is a positive association between the heights of men and women.
d. Any height above 70 inches must be considered an outlier.