ESTIMATION OF POPULATION MEAN THROUGH IMPROVED CLASS OF RATIO TYPE ESTIMATORS USING AUXILIARY INFORMATION

Abstract

In survey sampling we are often concerned with the estimation of population parameters with the use of auxiliary information at pre-selection stage, selection stage and estimation stage. If used properly, this information may provide better estimates than those where such information is not used. In this paper, an attempt has been made to develop a general class of improved ratio type estimators for estimation of population mean by modifying conventional ratio estimator whose large sample properties are compared with the conventional ratio estimator and estimators proposed by Sharma et al. (2010). It is observed that the proposed class of estimators performed better than conventional ratio estimator and estimators proposed by Sharma et al. (2010) on the basis of unbiasedness, mean squared error and efficiency criterion. An empirical study has also been presented in support of the present investigation.