Relative efficiencies of two-stage sampling schemes for mean estimation in multilevel populations when cluster size is informative.

ABSTRACT: In multilevel populations, there are two types of population means of an outcome variable ie, the average of all individual outcomes ignoring cluster membership and the average of cluster-specific means. To estimate the first mean, individuals can be sampled directly with simple random sampling or with two-stage sampling (TSS), that is, sampling clusters first, and then individuals within the sampled clusters. When cluster size varies in the population, three TSS schemes can be considered, ie, sampling clusters with probability proportional to cluster size and then sampling the same number of individuals per cluster; sampling clusters with equal probability and then sampling the same percentage of individuals per cluster; and sampling clusters with equal probability and then sampling the s

SUBMITTER: Innocenti F 

PROVIDER: S-EPMC6590157 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature