A SHORT REVIEW OF ESTIMATION OF POPULATION VARIANCE THROUGH RATIO ESTIMATORS

The present manuscript is a short review of the ratio type estimators of population variance of the study variable using auxiliary information on a single auxiliary variable. In this paper various ratio type estimators of population variance in the literature have been given in chronological order. The large sample properties that is biases and the mean squared errors of these ratio type estimators of population variance have been given up to the rst order of approximation. The expressions of the bias and the mean squared error of every mentioned estimator have been given up to the rst order of approximation.