If an iq test has high predictive validity, then

Question

a. a psychologist can accurately guess what score someone will get before he or she has started the test.
b. students who get good score on the test will get even better scores if they take the test again
c. The mean and dtandard deviation on the test are equal for all groups of people
d.students who do well on the test also get good grades in school

Answer 1

I'll be glad to check your answer.

Answer 2

I think your teacher is under the gross mistaken belief that IQ and grades in school are related. Answers a,b, c are silly, and answer d) is mistaken. But I bet your teacher thinks it is correct.

http://en.wikipedia.org/wiki/Predictive_validity