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Evian, CFA2020-02-07 18:30:44
王同学你好,
注意题目描述:
A is more than 1.96 standard devations from the mean. 其中from themean的意思是均值左右1.96倍标准差
B falls between the mean and 1 standard devations above the mean. 其中between the mean和1 standard devations above the mean的意思是介于均值和均值右边1倍标准差
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