The Following Statement About the Sample Correlation Coefficient Is True ${ r} ^ { 2 } _{ X Y }$

Multiple Choice

The following statement about the sample correlation coefficient is true.

A) -1 ? r_X,Y ? 1.
B) ${ r} ^ { 2 } _{ X Y }$ $\stackrel { p } { \rightarrow }$ corr(X_i, Y_i) .
C) | r_X,Y | < 1.
D) r_X,Y = $\frac { S _ { x y } ^ { 2 } } { S _ { x } ^ { 2 } S _ { y } ^ { 2 } }$