Use of auxiliary information has been extensively used in survey
sampling to increase the precision of the estimates. Ratio and
Regression methods are most popular methods that utilizes information of
auxiliary attributes. The auxiliary information has also been used in
two-phase sampling for estimation of population characteristics. In this
book use of auxiliary attributes have been proposed in two-phase
sampling. Several methods have been proposed by using information on
auxiliary attributes. The generalized ratio and regression families have
been suggested. We have also proposed the shrinkage estimators by using
information of multiple auxiliary attributes.