Estimating the Population Mean in Two-Stage Sampling with Equal Size Clusters under Non-Response Using Auxiliary Characteristic

The present paper has been devoted to the study of estimating the population mean in two-stage sampling with equal size clusters under non-response using an auxiliary variable. This paper focuses on the study of general families of factor-type estimators of population mean considering two different cases in which non-response is observed on study variable only and on both study and auxiliary variables respectively. The optimum properties of the proposed families in both the cases are discussed. The empirical study is also carried out in support of the theoretical results.