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【简答题】
有一个研究者准备进行一次邮寄调查,但是由于研究费用有限,如果他选择大样本,则只允许进行一个轮次的再邮寄调查,显然未答误差会较大;如果选择缩小样本,这样可以进行多轮次的再邮寄调查,但抽样误差会增加,因此,他会选择哪种处理方法?
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