Generalized exponential-type ratio-cum-ratio and product-cum-product estimators for population mean in the presence of non-response under stratified two-phase random sampling

In this paper,generalized exponential-type estimators have been proposed for estimating the finite population mean of study variable using information on two auxiliary variables in the presence of non-response under stratified two-phase random sampling. the expressions for the bias and mean square error (mse) of proposed estimators have been derived in two different situations of non-response. theoretical comparisons of proposed estimators have been made with modified forms of hansen and hurwitz (1946),ratio and product estimators to the stratified two-phase sampling method. an empirical study has also been carried out to demonstrate the performances of proposed estimators. © 2015 pakistan journal of statistics.