Suppose the variable 
has been omitted from the following regression equation, 
is the estimator obtained when ![]()
src="@@PLUGINFILE@@/ppg__cognero__Ch_03_Multiple_Regression_Analysis_Estimation__media__def961f9-c383-4603-be40-6b7c9396899a.PNG" style="vertical-align:-9px;" height="25px" width="17px" /> is omitted from the equation. The bias in 
is negative if _____.
A. 
>0 and 
and 
are positively correlated
B. 
<0 and 
and 
are positively correlated
C. 
=0 and 
and 
are negatively correlated
D. 
=0 and 
and 
are negatively correlated
Answer: B
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