Consider the example in the section "Stratified Sampling". The study population is a junior high school with a total of 4,000 students in grades 7, 8, and 9. Researchers want to know how much these ...

This example illustrates the use of regression analysis in a simple random cluster sampling design. The data are from S rndal, Swenson, and Wretman (1992, p. 652). A total of 284 Swedish ...

Strip adaptive cluster sampling is extended to situations where the primary units have unequal numbers of secondary units. Primary units are selected with replacement and with probabilities ...

The correct application of the variance inflation factor approach for sample size calculations in trials that randomize intact clusters of individuals rests on knowledge of the variance of the outcome ...