ABSTRACT
Thus far, in Chapters 9 and 10, we have studied inferences about a single population. In contrast, the present chapter is concerned with comparing two populations with respect to a measure of centrality, either the population mean or the population median. We assume the following:
1. X1, . . . ,Xn1 ∼ P1 and Y1, . . . , Yn2 ∼ P2 are continuous random variables. The Xi and the Yj are mutually independent. In particular, there is no natural pairing of X1 with Y1, X2 with Y2, etc.
