Design and Estimation in Two-Way Stratification
双向分层的设计与估计
One may encounter populations for which there are two effective stratifying criteria, both of which are desirable in a sample design. However, the number of permitted observations may be less than the number of strata formed by the usual double stratification technique. A method which will permit estimation in these cases is presented. Both biased and unbiased estimators are considered. It is shown that if the stratification effects are additive in the analysis-of-variance…