回归稀释偏倚
回归稀释偏倚(regression dilution bias),X变量如果有度量误差或者噪音的话,斜率估计就会偏小。X的方差越大,偏离的越多。如果可能的话,应该尽量避免出现这种问题。 公卫家园
Regression dilution, also known as regression attenuation, is the biasing of the regression slope towards zero (or the underestimation of its absolute value), caused by errors in the independent variable.
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