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stratified sample

/ˈstrætɪfaɪd ˈsæmpl/

翻译: 一种统计抽样方法,将总体按某些共同特征划分为若干互不重叠的子群(层),再从各层中按比例或均匀地抽取样本,以保证样本的代表性。

1 个条目

phrase

/ˈstrætɪfaɪd ˈsæmpl/C1formalscientific
  • zh一种统计抽样方法,将总体按某些共同特征划分为若干互不重叠的子群(层),再从各层中按比例或均匀地抽取样本,以保证样本的代表性。

A statistical sampling method where a population is divided into distinct subgroups (strata) based on shared characteristics, and samples are drawn from each subgroup proportionally or equally to ensure representation.

  1. Statistical sampling methodC1formal

    A sampling technique where the population is divided into distinct subgroups (strata) and samples are drawn from each subgroup proportionally.

    zh分层抽样

    • The researchers used a stratified sample to ensure all age groups were represented.
    • A stratified sample was taken from different income brackets for the survey.
    • The study employed a stratified sample to analyze regional differences.