Estimation of the ratio of two totals is considered, when a probability sample from the finite population is available. Four estimators of the ratio are examined. The first one – called " simple " – is the ratio of the Horvitz–Thompson estimators of totals; the second – the ratio of two ratio estimators of totals; the third one – the ratio of two regression… (More)
The definition of a calibrated estimator of the finite population parameter which may be not population total is discussed. Some estimators of the ratio of two population totals and population covariance is presented.