stat512prob12

stat512prob12 - those dierences are and also explain why...

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Statistics 512: Problem Set No. 12 Due December 11, 2009 For the remaining problems use the Rehabilitation therapy data of problem 22.11 ( CH25PR11.DAT ) in the text (also see the description in Problem 16.9). 1. Analyze this data using a one-way ANOVA model, ignoring patient age. Summarize your conclusions from this analysis. 2. Analyze the data using a one-way ANCOVA model with patient age as a covariate. Show appropriate graphs and summarize your conclusions from this analysis. 3. Explain any differences in your conclusions from the two analyses. (You should say what
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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 two-way ANOVA model, ignoring sales volume, to the two-way ANCOVA model. Explain dierences in your conclusions from the two analyses. 5. For the factor age , perform Tukey-adjusted comparson of the 3 dierent levels. Does the conclusion of this analysis change when going from the two-way ANOVA model to the two-way ANCOVA model? 1...
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