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cluster |
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cluster, n in epidemiology, a composite of confirmed cases of a disease, defect, or disability that occur in close proximity to one another with regard to time or space. cluster 1. in epidemiological terms a naturally occurring group of similar units, e.g. animals which resemble each other, with respect to one or more variables, more than animals in different groups do, or a group of cases of a single disease in time or space. 2. assembly of claw and teat cups, as part of a milking machine. cluster analysis 1. statistical methods used to group variables or observations into strongly interrelated subgroups. 2. a statistical analysis of the relationships between clusters in time and/or space. cluster fly see polleniarudis. cluster sampling see cluster sampling. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Cluster sampling to assess immunisation coverage: a review of experience with simplified sampling method. Using cluster sampling by geographic region, 2,654 questionnaires were distributed to members of the Chartered Society of Physiotherapy and the Irish Society of Chartered Physiotherapists (30,000 members total). A fixed cluster sampling plan was used with two pre-selection criteria: (1) individuals must be at least 18 years of age and (2) individuals must have daily access to the Internet either from home computer, business computer or both. |
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