i. If the coefficient of determination is 0.81, what is the coefficient of correlation? ii. If the coefficient of correlation is -0.81, what is the coefficient of determination?
iii. If the dependent variable is measured in dollars, in what units is the standard error of estimate measured?
A) +/-0.9; 0.6561; dollars squared.
B) +/-0.9; 0.6561; dollars.
C) 0.6561; 0.9; dollars.
D) 0.6561; +/-0.9; dollars squared.
E) 0.9; -0.9; dollars squared.

Question

Quizplus · Accepted Answer

i. The coefficient of correlation is the square root of the coefficient of determination. Thus, √0.81 = 0.9.
ii. The coefficient of determination is the square of the coefficient of correlation. Thus, (-0.81)^2 = 0.6561.
iii. The standard error of estimate is measured in the same units as the dependent variable, which in this case is dollars. Therefore, the answer is "dollars".

I If the Coefficient of Determination Is 0