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

Thesaurus

Noun

stratified sample - the population is divided into strata and a random sample is taken from each stratumproportional sample, representative samplestatistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameterssample distribution, sampling, sample - items selected at random from a population and used to test hypotheses about the population

stratified sample

a SAMPLE which is selected by first stratifying the parent population. The procedure involves dividing the population into strata relevant to the study to be undertaken, e.g. for a study of voting intention, social class and age may be relevant; for a study of attitudes to the benefit system, income level and employment status would be relevant. When the strata have been identified RANDOM SAMPLES are taken from each. As long as these samples are of sizes proportionate to the size of each stratum within the parent population (proportionate stratification), this method allows improved precision, particularly if a sample is being taken from a relatively large population, since it introduces some controlled restrictions on selection. However, disproportionate stratification may be used if a stratum is too small to yield a sufficiently large sample for analysis if the criterion for selection used in other strata is adopted.

stratified sample

strat·i·fied sam·ple

a subset of a total population, defined by some objective criterion such as age or occupation, is sampled.

FinancialSeesample

stratified sample

Related to stratified sample: Simple random sample, Systematic sample

noun

Synonyms for stratified sample

noun the population is divided into strata and a random sample is taken from each stratum

Synonyms

proportional sample
representative sample

Related Words

statistics
sample distribution
sampling
sample

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