Identify which of the statements are true and which are false. If false, explain why.

1. If r=0.5, there is no linear relationship between quantitative variables X and Y. ?
2. The closer ris to -1 or +1, the stronger the linear relation between X and Y.?
3. If r is close to zero, X and Yare unrelated.?
4. The value of r does not change when the units of measure are changed.?
5. Correlation coefficient depends on the choice of the dependent variable.?
6. Correlation coefficient measures the magnitude of the change in one variable associated with a change in the other.?