The college admissions office has determined that the correlation between IQ scores and college grade point average is .50.What percent of the variation in college grades is
Accounted for by knowing IQ scores?
A) 10
B) 15
C) 25
D) 50

Question

Quizplus · Accepted Answer

The square of the correlation coefficient (0.50) represents the proportion of variation in college grades that can be explained by IQ scores. So, 0.50^2 = 0.25 or 25%. Therefore, knowing IQ scores accounts for 25% of the variation in college grades. The correct answer is C.

The College Admissions Office Has Determined That the Correlation Between