math
posted by Anonymous on .
which of the following correlation demonstrate a casual relationship?
1 the distance student live from school and the time it takes each to walk there.
2 the amount of money received for allowance and the number of DVD's purchased.
3 the number of hours spend studying and the grades received on exams.
4 high school students' ages and the number of hours they sleep.
is the answer 3???

what is wrong with 1?

so is it 1?

If your question is about CAUSAL relationship, not CASUAL relationship, 1 is the correct answer.
There's very little correlation between the number of hours spent studying and the grades received on exams.