The denominator of the Pearson r is.
A) $C P _ { X Y }$
B) $\sum ( X - \bar { X } ) ( Y - \bar { Y } )$
C) $\left( S S _ { X } \right) \left( S S _ { Y } \right)$
D) $\sqrt { \left( S S _ { X } \right) \left( S S _ { Y } \right) }$

Question

The denominator of the Pearson r is. 
A) $C P _ { X Y }$
B) $\sum ( X - \bar { X } ) ( Y - \bar { Y } )$
C) $\left( S S _ { X } \right) \left( S S _ { Y } \right)$
D) $\sqrt { \left( S S _ { X } \right) \left( S S _ { Y } \right) }$

Quizplus · Accepted Answer

The denominator of the Pearson correlation coefficient (r) is the square root of the product of the sum of squares of X ($SS_X$) and the sum of squares of Y ($SS_Y$), which is represented by $\sqrt { \left( S S _ { X } \right) \left( S S _ { Y } \right) }$. This normalizes the covariance between X and Y, making the Pearson r dimensionless and ranging from -1 to 1.

The Denominator of the Pearson R Is CPXYC P _ { X Y }CPXY​

The Denominator of the Pearson R Is $C P _ { X Y }$