I have a questions bout ANCOVA’s Assumptions. I have 3 intervention groups:
G1= 2nd and 4th grade children
G2 = 2nd and 4th grade children
G3 = 2nd and 4th grade children
Firstly, I wanted to check the assumptions, but between which groups do I need to check the assumptions (normality, homegeinety of variance, etc) 2nd and 4th grade children? or G1, G2 and G3?
Thanks a lot,
Nuria
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