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【单选题】
对于正态分布的描述,错误的有A.
正态分布的均数与标准差分别为μ，σ
B.
正态分布是一种对称分布，它关于x=μ 左右对称。
C.
曲线下面积为 1
D.
s 决定曲线的形状， s 越小，分布越离散，曲线形状越平坦。
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