In sampling, the use of auxiliary information has been permeated the important role to improve the efficiency of the estimators. It is
well known that the use of auxiliary information results in substantial gain in efficiency over the estimators obtained from those
which do not use such information. Out of many, ratio, product and regression methods of estimation are good examples in this
context. When the correlation between the study variate y and the auxiliary variate x is positive (high), the ratio method of
estimation is quite effective.