search for: 6x2x2

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2011 Oct 17
1
Adjusted Means
I'm running the following ANCOVA model in R: X=a*b*d + d where d is the covariate. I want to produce adjusted means for X for all possible treatment combinations. a has 6 levels, b has 2 levels, c has 2 levels, so this is a 6x2x2 = 24 possible treatment combinations. When I run: effect("d", Ancova.Model) I am given only 20 adjusted means (also, I'm not exactly sure of how the adjusted means are reported, that is, which one represents which treatment combination...what order are they in?) Any ideas?? Thanks!...