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Unformatted text preview: those dierences are and also explain why they happened.) For the remaining problems, use the imitation cash oers of Problem 22.15 ( ch25pr15.dat ) in the text. 4. Compare the analysis of the twoway ANOVA model, ignoring sales volume, to the twoway ANCOVA model. Explain dierences in your conclusions from the two analyses. 5. For the factor age , perform Tukeyadjusted comparson of the 3 dierent levels. Does the conclusion of this analysis change when going from the twoway ANOVA model to the twoway ANCOVA model? 1...
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 Fall '08
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 Statistics

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