Estimation of Population Mean Using Co-Efficient of Variation and Median of an Auxiliary Variable

The present paper deals with a class of modified ratio estimators for estimation of population mean of the study variable using the linear combination of the known values of the Co-efficient of Variation and the Median of the auxiliary variable. The biases and the mean squared errors of the proposed estimators are derived and are compared with that of existing modified ratio estimators. Further we have also derived the conditions for which the proposed estimators perform better than the existing modified ratio estimators. The performances of the proposed estimators are also assessed with that of the existing estimators for certain natural populations. From the numerical study it is observed that the proposed modified ratio estimators perform better than the existing modified ratio estimators.