نتایج جستجو برای: stage cluster sampling
تعداد نتایج: 741164 فیلتر نتایج به سال:
This study investigated the patterns of alcohol disorder comorbidity with other psychiatric disorders, using Korean nationwide epidemiological data. By two-stage cluster sampling, 5,176 adult household residents of Korea were interviewed using the Korean version of the Diagnostic Interview Schedule. Psychiatric disorders strongly associated with alcohol disorders were, other drug abuse or depen...
The random variables are collapsed from a larger set of random variables of dimension .Using a theorem from Rao and Bellhouse (1978), we show via a minor extension to extend the theorem to predictors that a collapsed expanded set of random variables is adequate to predict characteristics of the PSUs (see c06ed23.doc). We also show (see c06ed25.doc) that further collapsing of the random variable...
Two-stage sampling usually leads to higher variances for estimators of means and regression coefficients, because of intra-cluster homogeneity. One way of allowing for clustering in fitting a linear regression model is to use a linear mixed model with two levels. If the estimated intra-cluster correlation is close to zero, it may be acceptable to ignore clustering and use a single level model. ...
The SBBrasil 2010 Project (SBB10) was designed as a nationwide oral health epidemiological survey within a health surveillance strategy. This article discusses methodological aspects of the SBB10 Project that can potentially help expand and develop knowledge in the health field. This was a nationwide survey with stratified multi-stage cluster sampling. The sample domains were 27 State capitals ...
For importance sampling (IS), multiple proposals can be combined to address different aspects of a target distribution. There are various methods for IS with multiple proposals, including Hesterberg’s stratified IS estimator, Owen and Zhou’s regression estimator, and Tan’s maximum likelihood estimator. For the problem of efficiently allocating samples to different proposals, it is natural to us...
Many health and other surveys aim to produce statistics on small subpopulations, such as specific ethnic groups or the indigenous population of a country. In most countries, there is no reliable sampling frame of the subpopulations of interest, hence it is necessary to sample from the general population, which can be very expensive. A range of issues and strategies for sampling rare subpopulati...
BACKGROUND The problem of overweight and obesity in children and adolescents is considered an epidemic in both developed and developing world by the WHO. There has been little study on the relationship between health literacy and body weight among adolescents.This epidemiological study aims to investigate the association between low health literacy and overweight and obesity among a population ...
Background: The problem of overweight and obesity in children and adolescents is considered an epidemic in both developed and developing world by the WHO. There has been little study on the relationship between health literacy and body weight among adolescents. This epidemiological study aims to investigate the association between low health literacy and overweight and obesity among a populatio...
The current study intends to examine the job satisfaction among government universities’ faculty in Khyber Pakhtunkhwa, Pakistan. Two stage cluster random sampling is used identify teachers for taking information. Five clusters (universities) are selected first stage. Then, education departments within universities considered as second of sampling. A structure questionnaire distributed them. da...
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