Efficient Estimators Using Auxiliary Variable under Second Order Approximation in Simple Random Sampling and Two-Phase Sampling

Table 1

Bias and MSE of estimators.

Estimators	Bias		MSE
	First order	Second order	First order	Second order
	0.062981	0.062546	39.231071	39.348971
	0.053623	0.052483	72.256693	73.329202
	0.057063	0.056678	39.218063	39.131656
	0.062513	0.062043	39.218073	39.334929