If the difference between r and zero is doubled, the portion of Y variance associated with X variance is
A) unchanged.
B) doubled.
C) halved.
D) quadrupled.

Question

Quizplus · Accepted Answer

The portion of Y variance associated with X variance is determined by the square of the correlation coefficient (r^2). If the difference between r and zero is doubled, then r becomes 2r, and (2r)^2 = 4r^2, which means the portion of variance is quadrupled.

If the Difference Between R and Zero Is Doubled, the Portion