换算成Z分布,标准差平均值三下五除二就正态了。
事业线嘛,有的时候不是选择的,一屁股坐在那儿就定了:)
换算成Z分布,标准差平均值三下五除二就正态了。
事业线嘛,有的时候不是选择的,一屁股坐在那儿就定了:)
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