个人收集整理 勿做商业用途
表中r12＝0.896，r13＝0.895，说明施肥量与有效灌溉面积和播种面积间高度相关. 我们可以通过对变量X2地变换来消除多重共线性.令X22＝X2/X3（公斤/亩），这样就大大降低了施肥量与面积之间地相关性，用变量X22代替X2，对模型重新回归，结果如下：文档收集自网络，仅用于个人学习 =－233.62 + 0.088X1 + 13.66*X2 + 0.096X3 - 0.099X4 R2＝0.91文档收集自网络，仅用于个人学习 t: (-3.10) (2.48) (3.91) (4.77) (-3.19)文档收集自网络，仅用于个人学习 从回归结果地t值可以看出，现在各个变量都已通过显著性检验，说明多重共线性问题基本得到解决.
个人收集整理 勿做商业用途
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个人收集整理 勿做商业用途
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