ziyenano 发表于 2013-1-24 10:41 
组间平方和的自由度为k-1(由SSR的计算公式可得),这里k为3,所以自由度为2;
tudent Newman test比较组两 ...
newman test 的结果就是这部分 Alpha 0.05
Error Degrees of Freedom 65
Error Mean Square 4.225148
Harmonic Mean of Cell Sizes 22.59649
NOTE: Cell sizes are not equal.
Number of Means 2 3
Critical Range 1.2213032 1.4667772
Means with the same letter are not significantly different.
SNK Grouping Mean N dose
A 15.6123 21 0
A
A 15.4900 24 5
A
A 15.1808 23 1
这部分就只说明两两之间差异不显著吗?这个结果显示的并不是两两比较的,而是三个一起呈现出来的,也表现了两两之间不显著吗?
还有请问一下 在出这个结果之前的overall ANOVA的结果
Variable: foodintake
Sum of
Source DF Squares Mean Square F Value Pr > F
Model 2 2.2097823 1.1048912 0.26 0.7707
Error 65 274.6346155 4.2251479
Corrected Total 67 276.8443979
R-Square Coeff Var Root MSE foodintake Mean
0.007982 13.32745 2.055516 15.42318
Source DF Type I SS Mean Square F Value Pr > F
dose 2 2.20978234 1.10489117 0.26 0.7707
Source DF Type III SS Mean Square F Value Pr > F
dose 2 2.20978234 1.10489117 0.26 0.7707
这个overall的结果就是说明了不同dose的情况下,没有差异吗?
口令中model foodintake=dose 这一步如何解释呢?
非常感谢!!!!!!