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PSYC 204
Heungsun Hwang

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• ANCOVA o H0: β1= 0 and μ’ 1 μ’ 2 μ’ 3 β1: the population regression slope for the covariate μ’1= μ’2= μ’3: all adjusted group means for the levels of promotion are the same o Assumptions:  Homogeneity of regression slope across different groups. E.g: the relationship between covariate and DV is the same across each level of factor.  Homogeneity of variance  Normal distribution  Independent observations • Checking assumption by analyzing ANCOVA MODEL WITH INTERACTION TERM o if there is signi
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