Suppose there is a correlation of r = 0.9 betwen number of hours per day student study and gpas. Which of the following is a reasonable conclusion?
A. 90% of students who study receive high grades.
B. 90% of students who receive high grades study a lot.
C. 90% of the variation in GPAs can be explained by variation in number of study hours per day.
D. 10% of the variation in GPAs cannot be explained by variation in number of study hours per day.
E. 81% of the variation in GPAs can be explained by variation in number of study hours per day.