Given the least squares regression line $\hat { y } = 2.48 - 1.63 x$ ,and a coefficient of determination of 0.81,the coefficient of correlation is:
A) -0.66
B) 0.81
C) -0.90
D) 0.90

Question

Quizplus · Accepted Answer

The coefficient of correlation is the square root of the coefficient of determination, so the coefficient of correlation is $\sqrt{0.81} = 0.9$. Therefore, the answer is choice C.

Given the Least Squares Regression Line y^=2.48−1.63x\hat { y } = 2.48 - 1.63 xy^​=2.48−1.63x

Given the Least Squares Regression Line $\hat { y } = 2.48 - 1.63 x$