In this article, we propose an improved estimator for finite population variance based on stratified sampling by using the auxiliary variable as well rank of variable. Expressions bias and mean square error estimators are derived up to first order approximation. Four real data sets used measure performances estimators. Moreover, a simulation study is also conducted observe efficiency proposed e...

In this paper we investigate the problem of estimation finite population mean using auxiliary information. The aim is to modify a separate ratio estimator by calibration approach for stratified random sampling. We use improve precision estimate parameter incorporating chi-square distance function minimize between original design weight and new weight. two constraints called equations find weigh...

background universities, like any other organization, are working in a variable and dynamic environment. in order to empower these organizations to deal with constant change, they should focus on organizational learning. objectives this research aimed to study the relationship between organizational learning and employees' empowerment among the headquarters staff of shiraz university of medical...

Objective. Today, obesity and depression are two major illnesses that are on the rise all over the world and threaten human health. This research was done to determine the relationship between Body Mass Index (BMI) and depression among Ahvaz high school female students. Method. In a descriptive-analytical study using stratified random sampling, 400 female high school students in academic year o...

This study aims to determine the prevalence and correlates of information seeking anxiety among a group of postgraduate students at a research-intensive university in Kuala Lumpur, Malaysia. The 38-item Information Seeking Anxiety Scale was administered to 375 postgraduate students drawn from a population of 11000 using stratified random sampling method. Results of the study revealed that infor...