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Значения термина stratified sample на английском

The population is divided into strata and a random sample is taken from each stratum.

        Использование термина stratified sample на английском
        1
        Design of study: Randomised controlled trial in a stratified sample.
        Pubmed
        2
        Methods: A stratified sample of 184 patients with primary sclerosing cholangitis and age- and sex-matched institutional control subjects were identified.
        Pubmed
        3
        Objective: In 2016, data were collected and analyzed from a nationally representative stratified sample of 816 LHDs.
        Pubmed
        4
        Using this as our sampling frame, we conducted questionnaire surveys with a stratified sample of 1,924 household heads and 945 household heads' wives.
        Pubmed
        5
        Methods: A randomized and stratified sample of 47,979 students from state and private schools of the 27 Brazilian state capitals completed a self-report questionnaire.
        Pubmed
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