試題詳解

7.Suppose Equation 2 is the correct model. That is, Age is a determinant of a person's carnings. Are older people more likely than younger people to have a college degree in this sample?
(A) Older people are more likely to have a college degree.
(B) Younger people are more likely to have a college degree.
(C) All people are equally likely to have a college degree.
(D) We don't have sufficient information to answer this question.
(E) None of the above choices (a)-(d).