Suppose you were interested in the relationship between body mass and basal metabolic rate and calculated an r value of -.79. How would you account for the variability between the two variables?
A) Square the r-value.
B) Take the square root of the r-value.
C) Take the log of the r-value.
D) Divide the r-value by itself.

Question

Quizplus · Accepted Answer

Squaring the r-value will give the coefficient of determination (r²), which represents the proportion of variance in one variable that can be accounted for by the other variable. In this case, since the r-value is negative, squaring it will result in a positive value (0.6241), indicating that 62.41% of the variability between body mass and basal metabolic rate can be explained by their negative relationship.

Suppose You Were Interested in the Relationship Between Body Mass