Relative efficiencies of two‐stage sampling schemes for mean estimation in multilevel populations when cluster size is informative
نویسندگان
چکیده
منابع مشابه
Analysis of clustered data when the cluster size is informative
Clustered data arise in many scenarios. We may wish to fit a marginal regression model relating outcome measurements to covariates for cluster members. Often the cluster size, the number of members, varies. Informative cluster size (ICS) has been defined to arise when the outcome depends on the cluster size conditional on covariates. If the clusters are considered complete then the population o...
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Gupta and Shabbir (2008) have suggested an alternative form of ratio-type estimator for estimating the population mean. In this paper, we introduced new estimators by mixing two, stratified and cluster sampling method. Then we improved these estimators by using auxiliary variables and introducing new estimators. For sampling in infinite populations with a high geographic dispersion, the populat...
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Clustered data commonly arise in epidemiology. We assume each cluster member has an outcome Y and covariates X. When there are missing data in Y, the distribution of Y given X in all cluster members ("complete clusters") may be different from the distribution just in members with observed Y ("observed clusters"). Often the former is of interest, but when data are missing because in a fundamenta...
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Sometimes in order to estimate population parameters such as mean and total values, we extract a random sample by cluster sampling method, and after completing sampling, we are interested in using the same sample to estimate the desired parameters in a subset of the population, which is said subpopulation. In this paper, we try to estimate subpopulation parameters in different cases when one-st...
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Based on clustered data with informative cluster size, two efficient estimation methods are proposed for marginal models. In our procedures, the information of within-cluster correlation and minimum cluster size is fully used; this is not the case with the within-cluster re-sampling (WCR) and cluster-weighted generalized estimating equation (CWGEE) methods. When the correlation model is valid a...
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ژورنال
عنوان ژورنال: Statistics in Medicine
سال: 2018
ISSN: 0277-6715,1097-0258
DOI: 10.1002/sim.8070