→ jewry2005 :w=ax+b,z=cy+d,當ac>0→Rwz=Rxy;ac<0→Rwz=-Rxy 06/08 12:21
→ yhliu :W=aX+b, Cov(W,Y)=aCov(W,X), SD(W)=|a|SD(X). 06/08 12:26
→ yhliu :Corr(W,Y)=Cov(W,Y)/[SD(W)SD(Y)] 06/08 12:27
→ yhliu : =aCov(X,Y)/[|a|SD(X)SD(Y)] 06/08 12:29
→ yhliu : = (a/|a|)Corr(X,Y) 06/08 12:29