Each type of design has specific first and subsequent stage capabilities. It also includes a nest statement, which indicates the design stages. Total count variables indicate the variables whose values are the population counts at each stage of sampling, and sample count variables indicate the sample counts at each stage of sampling. Sampling fraction corrections and variance adjustments are made with the help of a modification of the data set. The data are sorted according to the sample design nesting variables indicating the sampling stages.
Total counts are for sample and for sample population.
The input data must be numeric. It must be sorted according to the nesting design variables. However, it only handles fixed effect designs. It does not handle the random effects in either mixed or random effect designs. Dr. Robert Yaffee is a research consultant with the ACF Statistics and Social Science Group.