Definitions for "Least squares"
An estimating model that determines parameter weights based on the set that minimizes the sum of the squared deviation of predicted values from a line or set of observed values.
any line- or curve-fitting model that minimizes the squared distance of data points to the line.
a method of fitting a curve to data points so as to minimize the sum of the squares of the distances of the points from the curve
Keywords:  main, effect
Main Effect