نتایج جستجو برای: stage cluster sampling

تعداد نتایج: 741164  

Journal: :زن در توسعه و سیاست 0
علی حسین حسین زاده دانشیار گروه علوم اجتماعی دانشگاه شهید چمران اهواز مرضیه شهریاری دانشجوی دکتری جامعه شناسی و مدرس دانشگاه شهید چمران اهواز مریم فرجی بهبهانی زاده کارشناس ارشد مدیریت اجرایی واحد علوم و تحقیقات اهواز

social and cultural family raise more than before. this article examines the role of women in family economic efficiency. to identify the components listed on the theories of resources, power, system theory and empowerment is used. sampling technique used, multi-stage stratified sampling with probability proportional to size cluster sampling is. results show that independent variables, the part...

Journal: :Journal of statistical planning and inference 2008
Edward J Stanek Julio M Singer

Prediction of random effects is an important problem with expanding applications. In the simplest context, the problem corresponds to prediction of the latent value (the mean) of a realized cluster selected via two-stage sampling. Recently, Stanek and Singer (JASA, 2004) developed best linear unbiased predictors (BLUP) under a finite population mixed model that outperform BLUPs from mixed model...

2012
LP Galway Nathaniel Bell Al Shatari SAE Amy Hagopian Gilbert Burnham Abraham Flaxman Wiliam M Weiss Julie Rajaratnam Tim K Takaro

BACKGROUND Mortality estimates can measure and monitor the impacts of conflict on a population, guide humanitarian efforts, and help to better understand the public health impacts of conflict. Vital statistics registration and surveillance systems are rarely functional in conflict settings, posing a challenge of estimating mortality using retrospective population-based surveys. RESULTS We pre...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

2016
John W. Stanifer Joseph R Egger Elizabeth L. Turner Nathan Thielman Uptal D. Patel

BACKGROUND In order to begin to address the burden of non-communicable diseases (NCDs) in sub-Saharan Africa, high quality community-based epidemiological studies from the region are urgently needed. Cluster-designed sampling methods may be most efficient, but designing such studies requires assumptions about the clustering of the outcomes of interest. Currently, few studies from Sub-Saharan Af...

Journal: :Journal of Survey Statistics and Methodology 2021

Abstract Survey data are often collected under multistage sampling designs where units binned to clusters that sampled in a first stage. The unit-indexed population variables of interest typically dependent within cluster. We propose Fully Bayesian method constructs an exact likelihood for the observed sample incorporate unit-level marginal weights performing unbiased inference parameters while...

2017
D. R. Smith J. T. Rogala B. R. Gray Steven J. Zigler Teresa J. Newton D. R. SMITH J. T. ROGALA B. R. GRAY S. J. ZIGLER T. J. NEWTON

Reliable estimates of abundance are needed to assess consequences of proposed habitat restoration and enhancement projects on freshwater mussels in the Upper Mississippi River (UMR). Although there is general guidance on sampling techniques for population assessment of freshwater mussels, the actual performance of sampling designs can depend critically on the population density and spatial dist...

2004
STEVEN K. THOMPSON

We present a multi-phase variant of adaptive cluster sampling which allows the sampler to control the number of measurements of the variable of interest. A first-phase sample is selected using an adaptive cluster sampling design based on an inexpensive auxiliary variable associated with the survey variable. Then the network structure of the adaptive cluster sample is used to select an ordinary ...

Journal: :Mathematics and Computers in Simulation 2013
Jennifer A. Brown Mohammad Salehi M. Mohammad Moradi Bardia Panahbehagh David R. Smith

Designing an efficient large-area survey is a challenge, especially in environmental science when many populations are rare and clustered. Adaptive and unequal probability sampling designs are appealing when populations are rare and clustered because survey effort can be targeted to subareas of high interest. For example, higher density subareas are usually of more interest than lower density a...

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