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This study is devoted to obtain an ecient estima-tor for population mean in two-phase sampling using two auxiliary variables following Vishwakarma and Kumar (2014). Expressions for bias and mean squared error(MSE) are obtained to rst or-der of approximation. The new proposed estimator is compared with some competitor estimators both theoretically and numeri-cally using eight dierent data sets. It has been shown that the new proposed estimator gives more ecient results as compared to its competitor estimators.


Two-phase sampling auxiliary variable bias mean squared error Relative eciency

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How to Cite
Khan, L., & Shabbir, J. (2015). An Ecient Class of Estimators of Population Mean in Two-Phase Sampling Using Two Auxiliary Variables. Pakistan Journal of Statistics and Operation Research, 11(3), 397-408.