“combined ratio estimator”的概念、定义、翻译、参考文献-科学参考

单词	combined ratio estimator
释义	combined ratio estimator Encyclopedia 理学数据收集模式释 combined ratio estimator联合比估计分层随机样本下，分别计算出目标变量与辅助变量的总体特征的分层估计量，然后用对应的分层估计量来构造比率估计所得的估计量。
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