For example, clusters may be schools, hospitals, or geographical areas, and the final sampling units may be students, patients, or citizens. Cluster sampling can provide efficiencies in frame ...

The example in the section "Stratified Sampling" assumes that the sample of students was selected using a stratified simple random sampling design. This example shows analysis based on a more complex ...

Kaplan, Robert S. "Sample Size Computations in Dollar Unit Sampling." Studies on Statistical Methodology in Auditing, Supplement Journal of Accounting Research 13 (1975): 126–133.