If the correlation coefficient r is 0.81, what percentage of variation in the dependent variable is explained by a linear regression with the independent variable?
A) 90%
B) 81%
C) 66%
D) 10%

Question

Quizplus · Accepted Answer

The percentage of variation in the dependent variable explained by a linear regression with the independent variable is given by the square of the correlation coefficient, r^2. So, 0.81 squared is 0.6561, which is approximately 66%.

If the Correlation Coefficient R Is 0