Stratified Sampling and Cluster Sampling

Abstract

Complex survey designs involve at least one of the three features: (i) stratification; (ii) clustering; and (iii) unequal probability selection of units. In this chapter we provide some basic results on stratified sampling and cluster sampling. In Sect. 3.5 we provide a brief discussion on stratified two-stage cluster sampling, which reveals the notational complexities for complex surveys. General unequal probability sampling methods will be discussed in the next chapter.