Ben Chuanlong Du's Blog

It is never too late to learn.

Effect of Duplicating Observations in Linear Models

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

coefficients don't change but variance become smaller. use formula to show it ...

Complete Duplication of All Data Points

Complete Duplication of Some Data Points

Duplication with Noise

common in computer vision