Q153Section III (Statistics)153 of 180

Orthogonality of LS residuals to the regressor

If $e_1,e_2,\dots,e_n$ are the residuals obtained on fitting a simple linear regression $y=\beta_0+\beta_1X+\varepsilon$ to $(Y_i,X_i) i=1\dots n$ under the standard assumption, then:

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