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

Table 2

Bias and MSE of estimators under two phase sampling.

Estimators	Bias		MSE
	First order	Second order	First order	Second order
	0.075448919	0.0753124	158.5067369	158.90969
	0.049751632	0.0474159	221.9313664	222.50215
	0.061931	0.0620135	158.320	158.3868
	0.07413	0.0739541	158.320	158.99492