Enhanced Estimators of Population Variance with the Use of Supplementary Information in Survey Sampling

Table 1

Some existing known estimators of the class of estimators .

S. no.	Estimators	Values of constants
		1	, usual unbiased estimator	1	0	0	—	—
2	, Das and Tripathi [1] and Isaki [4] estimator	1	0	1	—	0
3	, Singh et al. [5] estimator	1	0	1
4	, Singh et al. [5] estimator	1	0	1
5	, Singh et al. [5] estimator	1	0	1
6	, Singh et al. [5] estimator	1	0	1
7	, Singh et al. [5] estimator	1	0	1
8	, Singh et al. [5] estimator	1	0	1
9	, Solanki et al. [17] estimator	1	0
10	, Solanki et al. [17] estimator	1	0
11	, Solanki et al. [17] estimator	1	0
12	, Solanki et al. [17] estimator	1	0
13	, Solanki et al. [17] estimator	1	0
14	, Solanki et al. [17] estimator	1	0