7. Which of the following is false? A none, since all of the other answer choices are true B the cost to mail an envelope and the weight of the envelope is a positive correlation C a child's age and a child's shoe size is a positive correlation D the graduation rate in a city and the rate of unemployment in a city is a positive correlation

Both A and D are false

Step-by-step explanation:

We expect lower academic performance when unemployment is high, so a lower graduation rate. Dropouts-those who don't graduate-tend to have a higher unemployment rate, so there is cause/effect working in both directions. Thus graduation rate and unemployment would be negatively correlated. (One study showed the correlation coefficient to be about - 0.11.)

Because D is false, A is also false.