相关系数:取值范围 Correlation coefficients: Possible values 如果p=-10p=-1.0 p W D 2+WEOE D 2WnW=σno D E p DOD WEO-2 Op-WDOD-WECEI W DOD WEO E E 0 WD=O/OD OE WE=OD/op+O:=1-WD 8-158-15 相关系数：取值范围 Correlation Coefficients: Possible Values 如果 r = -1.0 If r = -1.0 sp 2 = wＤ 2sＤ 2 + wＥ 2sE 2 - 2wDwE σD σ E sp = ︳wＤsＤ - wＥsE ︳ sp 2 = (wＤsＤ - wＥsE) 2 wＤsＤ - wＥsE = 0 wＤ=σE/(σD + σE) w E=σ D / (σD+σE) =1-WD