Education research consistently shows that students from wealthier families tend to have higher SAT scores.
The slope of the line that predicts SAT score from family income is 6.25 points per 1000, and the correlation between the variables is 0.48. Then the slope of the line that predicts family income from SAT score (in 1000 per point)
A) is 6.25 B) is 0.037 C) is 3.00 D) is 13.02 E) is 0.16
Question 2
A medical researcher finds that the more overweight a person is, the higher his pulse rate tends to be. In fact, the model suggests that 12-pound differences in weight are associated with differences in pulse rate of 4 beats per minute.
Which is true?
I. The correlation between pulse rate and weight is 0.33
II. If you lose 6 pounds, your pulse rate will slow down 2 beats per minute.
III. A positive residual means a person's pulse rate is higher than the model predicts.
A) none
B) I only
C) II and III only
D) III only
E) II only
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