stratified sample

https://doi.org/10.1351/goldbook.S06040
A sample consisting of portions obtained from identified subparts (strata) of the parent population. Within each stratum, the samples are taken randomly. The objective of taking stratified samples is to obtain a more @R05303@ than that which might otherwise be obtained by random sampling.
Source:
PAC, 1990, 62, 1193. (Nomenclature for sampling in analytical chemistry (Recommendations 1990)) on page 1203 [Terms] [Paper]
Citation: 'stratified sample' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.S06040 RIS BibTex EndNote
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Last revised: February 24, 2014