Statistics - Standard Least Squares Fit (Guassian linear model)
Table of Contents
1 - About
In a least squares, the coefficients are found in order to make RSS as small as possible.
Legendre published the method of least squares in 1805.
2 - Articles Related
3 - Scale-invariant
Standard least squares is scale-invariant The scaling of the variable doesn't matter because if a feature is multiplied by a constant, the coefficient can be divided by the same constant in order to get the same target.
Whether a length is measured in feet or inches is not going to matter because the coefficient can just account for the change in units.
4 - Ordinary
Ordinary Least Square (OLS) is a least square procedure performs on the the raw predictors.