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stratified sampling

/ˈstrætɪfaɪd ˈsɑːmplɪŋ/

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),然后从每一层中独立随机抽取样本,以保证样本的代表性。

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phrase

C1formalcommonscientific/ˈstrætɪfaɪd ˈsɑːmplɪŋ/

A statistical method of sampling that involves dividing a population into distinct subgroups or strata based on shared characteristics, then randomly selecting samples from each stratum to ensure representation.

  • 🇨🇳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),然后从每一层中独立随机抽取样本,以保证样本的代表性。
  1. Statistical sampling method C1 formal

    A method of sampling that involves dividing a population into subgroups (strata) and then taking a sample from each subgroup.

    • The researchers used stratified sampling to ensure all age groups were represented.
    • Stratified sampling reduces sampling error compared to simple random sampling.
    • In stratified sampling, the population is divided into homogeneous groups before sampling.

    🇨🇳分层抽样