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IBGE想估计巴西公司的平均收入。描述SRS、按部门分层和按整群的抽样如何进行。哪个会更有效?为什么?
IBGE想估计巴西公司的平均收入。描述SRS、按部门分层和按整群的抽样如何进行。哪个会更有效?为什么?
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