Maniru Shehu and Ran Vijay Kumar Singh
In this paper a modified ratio-type exponential estimator for estimating population mean under stratified random sampling using minimum and maximum values of auxiliary variable has been suggested. The mathematical expressions for the bias and mean square error have been derived up to first order of approximation. The numerical comparison has been also carried out which revealed that the proposed estimator performed better than other existing estimators.
Keywords: Bias, Mean square error, Minimum and maximum values, Auxiliary variable, Stratified Random sampling, Exponential estimators.