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概率是描述某随机事件发生可能性大小的数值，以下对概率的描述哪项是错误的A．其值必须由某一统计

概率是描述某随机事件发生可能性大小的数值，以下对概率的描述哪项是错误的

A．其值必须由某一统计量对应的概率分布表中得到

B．其值的大小在0和1之间

C．随机事件发生的概率小于0.05或0.01时可认为在一次抽样中它不可能发生

D．必然事件发生的概率为1

E．当样本含量n充分大时，我们有理由将频率近似为概率

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