【判断题】【消耗次数：1】
标准差是最重要、最完善的差异量数，它能较好地表示一组数据的差异情况或离散程度。
①
对
②
错
参考答案：
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均数和标准差的关系是:（）。
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均数愈大,S愈小
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S愈大,均数对各变量值的代表性愈好
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S愈小,均数对各变量值的代表性愈好
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S愈小,均数与总体均数的距离愈大
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