| 释义 |
stratified sampling 释义 分层抽样:将一个大群体按照年龄、性别、社会阶层等因素分成若干层,然后从每一层中随机抽取一定数量的样本,以便更好地了解整个群体的意见。 例句 1·METHODS an investigation was made by cluster and stratified sampling method. 方法采用多阶段分层整群抽样方法入户调查。 2·Stratified sampling can reduce the sampling error associated with simple random samples. 分层抽样可以减少由简单随机抽样造成的抽样误差。 3·Methods: The stratified sampling and cluster random sampling methods are used in this survey. 方法:本研究采用分层随机抽样方法和整群随机抽样方法。
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