Question 1:

Which of these is true about correlation and causality?

1. Causality is a symmetric relation
2. Correlation in an asymmetric relation (x affects y is different from y affects x)
3. Causality is an asymmetric relation. (x causes y is different from y causes x)
4. None of the above

• Answer

Question 2:

Which of the following statements best describes this expression? Cov (x,y) > Cov (y,x)

1. x influences y more than y influences x
2. y influences x more than x influences y
3. The statement can never be true
4. None of the above

• Answer