If the correlation between X and Y is .70, the proportion of variance in Y that is predictable from X is
A) .30.
B) .49.
C) .70.
D) .90.
E) None of these.

Question

Quizplus · Accepted Answer

The coefficient of determination (r squared) is equal to the square of the correlation coefficient (r). Therefore, r squared = 0.70 squared = 0.49. This means that 49% of the variance in Y is predictable from X.

If the Correlation Between X and Y Is