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During sampling of granular materials (whether airborne, suspended in liquid, aerosol, or aggragated), correct sampling is defined in Gy's sampling theory as a sampling scenario in which all particles in a population have the same probability of ending up in the sample.〔P. M. Gy (1979), ''Sampling of Particulate Materials: theory and practice.'' Elsevier: Amsterdam, 431 pp.〕 The concentration of the property of interest in a sample can be a biased estimate for the concentration of the property of interest in the population from which the sample is drawn. Although generally non-zero, for correct sampling this bias is thought to be negligible.〔 ==See also== *Particle filter *Particle in a box *Particulate matter sampler *Statistical sampling *Gy's sampling theory 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Correct sampling」の詳細全文を読む スポンサード リンク
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