In this paper certain ratio estimators in two-stage sampling set up with unequal first stage units, using information on two auxiliary variables (x and z) are considered and their efficiencies are compared with estimator without using second auxiliary variables z.
A.K.P.C. Swain , S. S. Mishra (2017); Ratio Estimators in two Stage Sampling Using Auxiliary Information;
Int J Sci Res Publ 7(4) (ISSN: 2250-3153). http://www.ijsrp.org/research-paper-0417.php?rp=P646364