【判断题】【消耗次数：1】
直接用标准差比较两个平均数代表性大小的前提条件是两个被比较的平均数相等。
①
正确
②
错误
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相关题目
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用标准差比较，分析两个同类总体平均指标的代表性的前提条件是
①
两个总体的标准差应相等
②
两个总体的平均数应相等
③
两个总体的单位数应相等
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两个总体的离差之和应相等
【单选题】
用标准差比较，分析两个同类总体平均指标的代表性的前提条件是
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两个总体的标准差应相等
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两个总体的平均数应相等
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两个总体的单位数应相等
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两个总体的离差之和应相等
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