In this paper we have worked to weight and transform various estimators by Prasad (1986) and Lui (1991). We have introduced some ratio and ratio type estimators under weighting, transformation and model based approach, environment. We have introduced estimators efficient than estimators proposed...

Abstract. This paper considers the problem of estimating the population mean of the study variable Y using systematic sampling in presence of an auxiliary variable X . A class of estimators is proposed and its properties are studied under large sample approximation. It is shown that the proposed...