张老师教统计学讲解40 | 估计两个均值之间的差异 | 方差已知
Synopsis
如果我们有两个总体，其均值分别为µ1 和µ2，方差已知分别独立地服从正态分布，则µ1 和µ2 之间差异的点估计量由以下统计量样本 ...
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