Why choose square, not absolute value for the Least Square Method and variance ?
[Maths Intro An interesting question that I meet on the Maths class... And Prof. Hart provided me very detailed and convincing explanation in the our email conversation about this problem after class... What a memorable and enlightening process of thinking behind that "simple" Maths question!!!
Permission of sharing this email conversation has been granted by Prof. Hart on Jan 19, 2023
