If the coefficient of correlation is 0.80, the percentage of the variation in y that is explained by the variation in x is:
A)80%.
B)0.64%.
C)-80%.
D)64%

Question

Quizplus · Accepted Answer

The coefficient of determination, r-squared, is equal to the coefficient of correlation squared. Therefore, 0.80 squared is equal to 0.64, which means that 64% of the variation in y is explained by the variation in x.

If the Coefficient of Correlation Is 0