stratified sample

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Related to stratified samples: Stratified random sampling

stratified sample

n
(Statistics) statistics a sample that is not drawn at random from the whole population, but separately from a number of disjoint strata of the population in order to ensure a more representative sample. See also frame13
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Noun1.stratified sample - the population is divided into strata and a random sample is taken from each stratum
statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters
sample distribution, sampling, sample - items selected at random from a population and used to test hypotheses about the population
References in periodicals archive ?
For stratified samples, a minimum of 100 sample items are necessary for each stratum; unstratified samples require a minimum of 250 sample items.
Innovative solutions will be adopted for the obtainment of the stratified samples, integrating different technologies as the electrospinning, freeze-drying and foam replica method.
Longer working hours were associated with increased anxiety and depression in female veterinarians overall, and in stratified samples of women with and without children.