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stratified sample
(redirected from stratified samples)

    Also found in: Medical 0.01 sec.
stratified sample
n
(Mathematics & Measurements / 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 frame [13]
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.stratified sample - the population is divided into strata and a random sample is taken from each stratum
proportional sample, representative sample
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
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Number of depth- Haul Date Time Day or night stratified samples HH-05A 3 Aug 2000 1600 Day 8 HH-05B 5 Aug 2000 2356 Night 8 HH-05C 6 Aug 2000 0330 Night 8 HH-05D 6 Aug 2000 0630 Day 8 HH-05E 6 Aug 2000 1623 Day 9 HH-05F 7 Aug 2000 0343 Night 9 HH-05G 7 Aug 2000 0633 Day 7 HH-05B 11 Aug 2002 0350 Night 9 HH-05C 11 Aug 2002 0722 Day 8 Table 2 Day, night, and total mean densities (number/1000 [m.
Diel variation in vertical distribution of an offshore ... by Auth, Toby D.; Brodeur, Richard D.; Fisher, Kathleen M. / Fishery Bulletin
As long as a correct procedure for estimating parameters from stratified samples is used, the estimates are valid and their standard errors are reduced.
Lymphohematopoietic malignancies in uranium miners: Kulich et al. ... by Kulich, Michal; Rericha, Vladimir; Rericha, Robert; Shore, David L.; Sandler, Dale P. / Environmental Health Perspectives
Stratified samples are often appropriate to account for political considerations.
Seeing is believing: the use of trained observer ratings for ... by Giancoli, Donald / Government Finance Review
 
 
 
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