Lock, MarthelAdnan, ArismanSirait, Haposan2016-02-042016-02-042016-02-04wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/7910This article discusses three estimators of ratio population (R) of the population mean of variable X and Y in post strati ed sampling scheme, using transformed auxiliary variables X. The three estimators that discussed in this article are the estimator proposed by Onyeka et al.[Open Journal Statistics 5(2015): 1-9 ]. Bias and MSE of the three estimators show by approximation MacLaurin series. Furthermore, the suitable condition for an estimator is more e cient than another estimator discovered.enTransformed auxiliary variableratio of populationpost strati cation methodstudent Paper Post Degree