e****e
发帖数: 3450 | 1 一堆scatteplot linear regression算出 y=mx，R square=n。如何自动把outlier标出
来呢？谢谢 |
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m*****8
发帖数: 27 | 2 对于simple linear regression,y(i)=E(Y|X=x(i)).
One of the assumptions concerning the errors is
E(e(i)|x(i))=0, so if we draw a scatteplot of the e(i) versus x(i),we would
have null scatterplot, with no patterns.
问题是为什么要做这样一个假设，E(e(i)|x(i))=0说明e(i)和x(i)没有correlation吗
？如果是的话，怎么推出来的呢？谢谢! |
|
m*****8
发帖数: 27 | 3 对于simple linear regression,y(i)=E(Y|X=x(i)).
One of the assumptions concerning the errors is
E(e(i)|x(i))=0, so if we draw a scatteplot of the e(i) versus x(i),we would
have null scatterplot, with no patterns.
问题是为什么要做这样一个假设，E(e(i)|x(i))=0说明e(i)和x(i)没有correlation吗
？如果是的话，怎么推出来的呢？谢谢! |
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