Homework 2 Questions for Applied Regression Analysis | STAT 51200, Assignments of Statistics

Download Homework 2 Questions for Applied Regression Analysis | STAT 51200 and more Assignments Statistics in PDF only on Docsity! Statistics 512: Homework#12 Due May 4, 2009 For the the next two problems use the Coil winding data of Problem 25.9 (CH24PR09.DAT) in the text. 1. Analyze this data using the random effects model. Test the null hypothesis that the mean coil winding characteristic is the same in all machines (i.e. test whether σ2µ = 0) . Interpret the results of your analysis. 2. Give a point estimate of the intraclass correlation coefficient σ 2 µ σ2µ+σ 2 . 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). 3. Analyze this data using a one-way ANOVA model, ignoring patient age. Summarize your conclusions from this analysis. 4. 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. 5. Explain any differences in your conclusions from the two analyses. (You should say what those differences are and also explain why they happened.) 1