老师您好!我现在有一个three-way regression model, 一个自变量和两个moderator, y=a0+a1*X1+a2*X2+a3*X3+a4*X1*X2+a5*X1*X3+a6*X2*X3+a7*X1*X2*X3。 我做了很多个model,但是发现单独的自变量都不显著,然后二阶交互项也都不显著,但是只有X1*X3*X3的系数是显著>0的,同时在three-way model里有几个交叉项也变显著了,请问这个该怎么解释了?我能不能说the variable and interactions cannot affect Y by them alone, but only the combined effects of three variables can significantly affect Y,或者说 X3 can positively moderate the interaction effect of X1 and X2 on Y? 谢谢老师
|