当正态总体方差未知时，样本均值经过标准化后服从的分布为（）。 -题库考试答案搜索网

当正态总体方差未知时，样本均值经过标准化后服从的分布为（）。

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2021-07-17 23:57

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标签：电子商务高起专数据库原理与应用 2020级第一学期期末考试

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当正态总体方差未知时，样本均值经过标准化后服从的分布为（ ）。

当正态总体方差未知时，样本均值经过标准化后服从的分布为（）。