In assessing the relationship between variable X and variable Y, the squared value of the correlation coefficient (r²) is sometimes reported. This value represents: A)the degree of variability in variable X. B)the degree of variability in variable Y. C)the effect size of the variables. D)the percent of variability in Y that can be accounted for by X.

Question

Quizplus · Accepted Answer

The squared value of the correlation coefficient (r^2) represents the proportion of variability in Y that can be accounted for by X. Therefore, option D is the correct answer. Options A and B are incorrect because r^2 does not represent the degree of variability in X or Y alone. Option C is incorrect because r^2 does not represent the effect size of variables, but rather the amount of variance in Y that can be explained by X.

In Assessing the Relationship Between Variable X and Variable Y