Disproportionate Sampling and Weighting Are Used by the Researcher

Multiple Choice

Disproportionate sampling and weighting are used by the researcher:

A) to ensure a sufficient number of cases in each of the sample subpopulations
B) to give a proportionate representation to each sample element
C) to provide a representative picture of the total population
D) to handle situations involving the errors and approximation that are often inherent in complex,multistage designs
E) all of these choices are correct