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推论统计学-Lesson 4 正态分布 5 一元二次方程 #229

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Xman1973 opened this issue Jan 26, 2019 · 0 comments

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Xman1973 commented Jan 26, 2019

均值和方差的出现有点突然了，没有事前有概念性的介绍

Hty9103 added the 内容优化 label

Hty9103 assigned Kyliewang

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