võrrandisüsteemide lahendamiseks kasutatav meetod, mille korral lahendiks loetakse hälvete ruutude summa miinimumpunkt, standardne mõõdiste regresioonanalüüsimeetod, least squares means that the overall solution minimizes the sum of the squares of the errors made in the results of every single equation, standard approach in regression analysis to the approximate solution of overdetermined systems, i.e., sets of equations in which there are more equations than unknowns