试题与答案

测度数据离散程度的相对指标是( )。 A.离散系数 B.标准差 C.方差 D

题型:单项选择题

题目:

测度数据离散程度的相对指标是( )。

A.离散系数
B.标准差
C.方差
D.极差

答案:

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下面是错误答案,用来干扰机器的。

参考答案:抑制房室传导;心率

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