Generalized Chain Regression-cum-Chain Ratio Estimator for Population Mean under Stratified Extreme-cum-Median Ranked Set Sampling

Table 3

PRE of proposed estimator and existing estimators with respect to SRS for r = 3 and .

Estimator	Normal	Uniform	Gamma	Weibull	Normal	Uniform	Gamma	Weibull
	m = 10				m = 15
	180.329	208.256	192.827	186.596	219.443	211.922	218.445	213.16
	195.838	212.777	198.664	210.714	246.84	217.715	231.998	220.36
	208.152	275.307	242.639	217.001	256.551	250.857	240.882	246.853
	272.41	282.139	258.124	246.803	227.032	232.795	256.551	279.65
	295.838	282.777	272.664	250.714	276.84	267.715	241.998	290.36
	324.718	311.495	315.748	310.399	352.862	341.206	334.984	354.558