8.4

(a) The file ‘multiple y v x, vary n.xlsx’, available on this book’s website (see Preface), contains data generated in the same way as those used in Exercise 8.3, except that the sample size varies: that is, the number of values of j varies between the values of i.

Repeat Exercise 8.3 using these data. N.B. The solution using GenStat or R requires programming techniques that go somewhat beyond those presented in this chapter, whereas that using SAS follows the pattern of Exercise 8.3 more closely.