对某省500户家庭的调查结果显示,80%的家庭拥有洗衣机,那么,在此问题中:1.总体是什么?2.样本是什么?3.样本量是什么?
1.总体是该省全省的家庭组成的集合。 2.样本是抽取的500户家庭所组成的集合。 3.样本量是500。
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