We've got a 2x2 between-subjects-design and would like to test a significant difference between four groups.
We used relative importances and analysed a chi2-test. The difference between the groups is not significant.
Furthermore, we used zero-centered-diffs (from SSI web) for MANOVA (independent variables: part worth utilities, dependent variables: group) to test the difference between the groups.
My question is: should zero-centered-diffs from every seperate group used for analysis?
Otherwise data sets from the four groups could be brought together, analysed via sawtooth and those zero-centered-diffs could be used for MANOVA.
Which pf the procedures is better to minimize a potential error?