Innocenti F, Candel MJ, Tan FE, van Breukelen GJ. Optimal two-stage sampling for mean estimation in multilevel populations when cluster size is informative. Statistical Methods in Medical Research. 2021;30(2):357-375. https://doi.org/10.1177/0962280220952833
R codes:
- simulation study
- to find the maximin parameter values when estimating one population mean
- to numerically evaluate the variance ratio
- to compute the maximin TSS1 design for comparing two population means