题目内容
（请给出正确答案）
极差是数据离散趋势的特征值之一，是数据中最大值与最小值之差，它的作用为()。
A．用数据变动的幅度来反映其分散状况的程度
B．反映数据变异程度的特征性
C．表示数据的相对离散波动程度
D．表示数据的代表性
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第2题
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A．Right
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第4题
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第6题
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第7题
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第8题
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