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  compiloes
  
2010 Oct 30
1
summary.lm for post-hoc tests
Let's say I've run Anova(lm(y~a*b)) and found the a:b interaction to be 
significant. Now I'm interested in which specific level combinations of 
a and b significantly differ from the control group. Can I use the 
t-tests from summary(lm(y~a*b)) to answer that question?
I saw no mention of multiple comparison in the documentation for 
summary.lm, so am I right in assuming I need to