例:求95%、93%、90%的几何平均数 395%×93%×90% 30.79515=92.64% (2)bgxG=(og0.95+bg093+bg0.90) 8912+8561+7.943)=845 92.71% (计算误差:0.0007)例： 求95%、93%、90%的几何平均数 0.79515 92.64% (1) 95% 93% 90% 3 3 = = xG =   ( ) (8.912 8.561 7.943) 8.455 3 1 log 0.95 log 0.93 log 0.90 3 1 (2) log = + + = xG = + + xG = 92.71% （计算误差：0.0007）