About simple correlation coefficient r which of the followin

About simple correlation coefficient r, which of the following statements is NOT right:

1. The value of r is always between -1 and +1.

2. The value for r does not change if all values of either variables are converted to a different scale.

3. The value of r is not affected by the choice of x or y. Interchange all x and y values and the value of r will not change.

4. r measures the strength of a linear relationship. It is not designed to measure the strength of a relationship that is not linear.

a. 1;    b. 2;    c. 3;    d. 4;    e. none of above.

Solution

c. 3;