We propose a jackknife variance estimator for the population average from two, two-phase samples after imputation. The jackknife method has long been used to estimate and reduce bias, but has now become a valuable tool for variance estimation. We apply two different sampling methods, (simple random sampling and stratified random sampling) to derive jackknife variance estimators for the twosampl...

We propose some ratio-type variance estimators using ratio estimators for the population mean in literature. We obtain mean square error (MSE) equations of proposed estimators and show that proposed estimators are more efficient than the traditional ratio estimator, suggested by [C.T. Isaki, Variance estimation using auxiliary information, Journal of the American Statistical Association 78 (198...

Genome enabled prediction provides breeders with the means to increase the number of genotypes that can be evaluated for selection. One of the major challenges in genome enabled prediction is how to construct a training set of genotypes from a calibration set that represents the target population of genotypes, where the calibration set is composed of a training and validation set. A random samp...

Background: General practitioners (GP) are the keystones in process of referring patients Iran. To refer to rehabilitation experts effectively and accurately, GPs need be equipped with knowledge understanding physical medicine (PMR) its roles have a positive attitude toward collaborating teams. Objectives: The current study aimed at evaluating knowledge, attitude, practice (KAP) Shiraz, Iran, f...

Sustainability has always been an emphasized topic in policy making and planning the agricultural sector of developing countries. Despite this fact, sustainable agriculture not realized so far because various complex challenges these The lack a structured scientific research on prompted us to conduct study fill gap create useful knowledge issue. In regard, 300 Iranian experts, selected through ...

Reservoir sampling is a well-known technique for random sampling over data streams. In many streaming applications, however, an input stream may be naturally heterogeneous, i.e., composed of substreams whose statistical properties may also vary considerably. For this class of applications, the conventional reservoir sampling technique does not guarantee a statistically sufficient number of tupl...

This study aims to find out 1) Influence of Student Perception on Financial Compensation and Work Environment On Interest in Choosing Teacher Profession In Economic Education Students 2) 3) About Students. The population this was students Faculty Economics, Universitas Negeri Padang the number selected samples as many 119 students. type research is descriptive associative research. sampling tec...

Software reliability testing provided the necessary guarantee for improving software reliability level and estimation. The traditional method for generating software reliability test cases could be seen as a simple random sampling, which was randomly choosen according to the operational profile defined by Musa. The stratified sampling was well known as a complex but more accurate sampling appro...

This paper considers the design of acoustic surveys for estimating the mean abundance of spatially correlated populations. We examined how the choice of survey design affects the bias and precision of the sample mean as an estimator of mean abundance. Further, we investigated three different ways of estimating the error variance of the sample mean: the pooled within strata variance and two geos...