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【多选题】
下列关于离散系数说法正确的有( )。A.
变量风险单位离散趋势的绝对指标称离散系数
B.
标志值的离散程度越大，其业务稳定性越好
C.
离散系数很多，最常用的是标准差系数
D.
标志值的离散程度越小，其业务稳定性越好
E.
标志值的离散程度越小，其业务稳定性越差
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