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two-stage sampling |
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two-stage sampling [′tü ¦stāj ′sam·pliŋ] (statistics) Sampling from a population whose members are themselves sets of objects and then sampling from the sets selected in the first sampling; for example, to first draw a sample of states and then to draw a sample of representatives to Congress from each state selected. 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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| Mean densities and standard errors of scallops were calculated using equations for a two-stage sampling design (Cochran 1977). Side-by-side comparisons with the six-stage version, however, revealed an approximately 40 percent lower recovery rate of bacteria with the two-stage sampling device, except when the device was sampling dilute concentrations of particles larger than 1 [micro]m. One way to conduct probability sampling of prostitutes is to take a two-stage sampling approach, in which the first stage consists of sampling locations and time slots from a spatial-temporal sampling frame, and the second stage involves screening and sampling eligible persons at locations and time slots sampled in the first stage. |
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