(Data file: sleep1) Suppose we have a response Y, a predictor X, and a factor G with g levels. A generalization of the concurrent regression mean function given by Model 3 of Section 5.1.3, is, for j...

(Data file: sleep1) Suppose we have a response Y, a predictor X, and a factor G with g levels. A generalization of the concurrent regression mean function given by Model 3 of Section 5.1.3, is, for

j = 1, . . . , g,