杨利霞 发表于 2020-3-15 16:30

回归分析预测（必须掌握）



回归分析预测（必须掌握）求一个因变量与若干个自变量之间的关系，若自变量变化后，求因变量如何变化；
样本点的个数有要求：
①自变量之间的协方差比较小，最好趋近于0，自变量间的相关性小；
②样本点的个数n>3k+1，k为自变量的个数；
③因变量要符合正态分布

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柠檬草lll 发表于 2020-4-19 10:09

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