Transformation techniques have been used to increase the efficiency of estimators in sample surveys. In this paper, some classes population mean using transformation on an auxiliary variable and both study variables proposed under double sampling. We obtain biases square errors up first order approximation. A simulation application a rubber production dataset illustrate performance estimators. ...

OBJECTIVE To examine the relation between the prevalence of deviation and the mean for the whole population in characteristics such as blood pressure and consumption of alcohol. DESIGN Re-examination of standardised data from the Intersalt study, an international, multicentre study on the determinants of blood pressure. SETTING AND SUBJECTS Samples of adults representing 52 populations in 3...

A generalized modified ratio estimator is proposed for estimating the population mean using the known population parameters. It is shown that the simple random sampling without replacement sample mean, the usual ratio estimator, the linear regression estimator and all the existing modified ratio estimators are the particular cases of the proposed estimator. The bias and the mean squared error o...

BACKGROUND For some phenomena the mean of population distributions predicts the proportion of people exceeding a threshold value. AIMS To investigate whether in depression, too, the population mean predicts the number of individuals at the extreme end of the distribution. METHOD We used data from the European Outcome in Depression International Network (ODIN) study from populations in Finla...