The number of individuals in different demographic groups who would have provided usable information if response rates were equivalent. See sample weighting.
加权样本如果回复率相等，那么会提供有用信息的具有不同人口统计特征的个人。
The number of individuals in different demographic groups who would have provided usable information if response rates were equivalent. See sample weighting.
加权样本如果回复率相等，那么会提供有用信息的具有不同人口统计特征的个人。
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