cluster sample


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clus·ter sam·ple

each sampling unit in a group of individuals.
References in periodicals archive ?
A means of determining the sample size required for a cluster sample with sufficient power is to incorporate the design effect in the calculations.
The margin of error reflects the influence of using a multi-stage cluster sample and data weighting.
Using this method, in addition to a cluster sample counting technique, we conducted exit count surveys at a reasonable cost, and we obtained statistical confidence values.
A common study design in health services research is the multistage cluster sample (Kish 1965) to abstract data from medical records.
A cross-sectional survey of a cluster sample of primary care patients in California and Canada revealed patients' requests for medicines are a powerful influence on prescribing decisions.
Analysis of data collected from a cluster sample of 299 undergraduate students suggests that a large majority of students use e-mail and the World Wide Web for academic-related activities.
So do humans, so there is less variation in a cluster sample and thus a broader error range.
The Survey Research Center at the University of Michigan conducted by telephone, with telephone numbers chosen from a cluster sample of residential numbers.
Survey methodology was based on a sophisticated stratified voter cluster sample, which randomly selects respondents across demographic characteristics and by propensity to vote to help assure accurate representation of the Menlo Park community.
Our representation of the diet composition of these fish should be viewed as preliminary because of the small cluster sample size ([n.
The third nationwide cluster sample survey was conducted in 2004 to update epidemiologic data for schistosomiasis in China.
Interviews were conducted by telephone, with telephone numbers chosen from a cluster sample of residential numbers.

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