55056886 234587 11 222222222222 222222 709 由于试验田大小(x)同样可以影响出售鲜花量(y),所以可用协方差分 析 花种 湿度低(b=1)湿度高(b=2) 无x LP(a=l) u +a+B+(aB) u +a (ANOVa) WB(a=2) u+B 含x LP(a=1) H+a+B+(ab)+yx u +a+yx (Co-ANOVA) WB(a=2) u+B+yx u +yx anova y a b a*b x a*b*x, class(a b) Number of obs 24 R-squared =0. 9786 Root mse 2.60706 Adj R-squared =0. 9693 ource Partial s df Prob >F Model4977.25219 7711.036027 104.61 0.0000 a38.8083118 138.8083118 5.71 0.0295 b44.0347332 44.0347332 6.480.0216 a:*b 027656949 1.027656949 0.9499 3703.3091 13703.3091 544.87 0.0000 a*b*x10.73374833.5777916 0.53 0.670446 2 1 2 55 3 1 2 55 4 2 1 60 5 2 1 75 8 2 1 65 7 2 1 87 13 2 1 78 11 2 1 76 11 2 2 68 10 2 2 43 2 2 2 47 3 2 2 62 7 2 2 70 9 2 2 由于试验田大小(x)同样可以影响出售鲜花量(y)，所以可用协方差分 析： 花种 湿度低(b=1) 湿度高(b=2) 无 x (ANOVA) LP(a=1) ..     + + + ( )   .. + WB(a=2)   .. + .. 含 x (Co-ANOVA) LP(a=1) ..      + + + + ( ) x ..    + + x WB(a=2) ..    + + x ..   + x anova y a b a*b x a*b*x,class(a b) Number of obs = 24 R-squared = 0.9786 Root MSE = 2.60706 Adj R-squared = 0.9693 Source | Partial SS df MS F Prob > F Model | 4977.25219 7 711.036027 104.61 0.0000 | a | 38.8083118 1 38.8083118 5.71 0.0295 b | 44.0347332 1 44.0347332 6.48 0.0216 a*b | .027656949 1 .027656949 0.00 0.9499 x | 3703.3091 1 3703.3091 544.87 0.0000 a*b*x | 10.7333748 3 3.5777916 0.53 0.6704 |