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词汇 stratified-sampling
释义 stratified sampling
noun[ U ]
 MARKETINGukus
the activity of dividing a large group of people into smaller groups based on age, sex, social class, etc. in order to find out more about the opinions of the whole group:
Stratified sampling can be used when the population is split up into groups who are likely to behave differently.

Examples of stratified sampling


stratified sampling
A real-world example of using stratifiedsampling would be for a political survey.
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Proportionate stratifiedsampling involves selecting participants from each strata in proportions that match the general population.
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While it is usually best to sample randomly, concern with differences between specific subpopulations sometimes calls for stratifiedsampling.
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Wikipedia

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In stratifiedsampling, the analysis is done on elements within strata.
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Wikipedia

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In stratifiedsampling, a random sample is drawn from each of the strata, whereas in cluster sampling only the selected clusters are studied.
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There are many reasons to use stratifiedsampling: to decrease variances of sample estimates, to use partly non-random methods, or to study strata individually.
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Wikipedia

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The advantage of stratifiedsampling is that the sample numbers in each stratum can be controlled for desired accuracy outcomes.
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A solution to this problem is to use an alternate design strategy, e.g. stratifiedsampling.
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Although cluster sampling and stratifiedsampling bear some superficial similarities, they are substantially different.
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Clearly stratifiedsampling algorithm concentrates the points in the regions where the variation of the function is largest.
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Wikipedia

This example is from Wikipedia and may be reused under a CC BY-SA license.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
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