In order for the correlation coefficient to be negative, which of the following must be true?
A) ΣXY ( ΣX )( Σ Y )/ N
B) ΣXY (ΣX )( ΣY )/ N
C) ΣXY = ( ΣX )( ΣY )/ N
D) ΣXY must be zero

Question

In order for the correlation coefficient to be negative, which of the following must be true?
A) ΣXY > ( ΣX )( Σ Y )/ N
B) ΣXY (ΣX )( ΣY )/ N
C) ΣXY = ( ΣX )( ΣY )/ N
D) ΣXY must be zero

Quizplus · Accepted Answer

For the correlation coefficient to be negative, the covariance (ΣXY - (ΣX)(ΣY)/N) must be negative, which implies ΣXY < (ΣX)(ΣY)/N.

In Order for the Correlation Coefficient to Be Negative, Which