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In this paper we deal with the estimation of population variance of the studyvariable y using auxiliary information on variable x. A family of ratio andproduct-type estimators are proposed using suitable transformation on bothrandom variable x(auxiliary variable) and(study variable).Up to the first orderof approximation the expression of mean square error and Bias term areobtained. An empirical study is carried out to illustrate the performance ofthe constructed estimator over others.

A generalised family of ratio product estimator using transformation equation