area sampling


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area sampling

[¦er·ē·ə ¦samp·liŋ]
(statistics)
A method in which the area to be sampled is subdivided into smaller blocks which are selected at random and then subsampled or fully surveyed; method is used when a complete frame of reference is not available.
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The sampling method, joining a chorus of "adaptive" research methods world-wide, is drawn from the concept of "species-area graphs" and is an adaptation of quadrat or area sampling common in the field of ecology.
based on area sampling of households across Japan, according to the regional population size, with a total of 6,356 household members), in which the earliest cases were diagnosed from October 2009 to mid-February 2010.