Refer to Exercise 1.21 and the longitudinal analysis in Section 9.2.5. Analyze the data in file FEV2.dat at www.stat.ufl.edu/~aa/glm/data , investigating the correlation structure for the eight FEV responses and modeling how FEV depends on the hour and the drug, adjusting for the baseline observation. Take into account whether to treat hour as qualitative or quantitative, whether you need interaction terms, whether to have random slopes or only random intercepts, and whether to treat within-patient errors as correlated.

Interpret results for your final chosen model. (You may want to read Littell et al. (2000). The book SAS for Mixed Models, 2nd ed., by Littell et al. (2006, SAS Institute), uses SAS to fit various models to these data.)