noun
least-squares method
A standard statistical technique for fitting a model to data by minimizing the sum of squared residuals.
回帰分析では最小自乗法がよく使われる。
The least-squares method is often used in regression analysis.
Compound of 最小 (smallest) + 自乗 (square) + 法 (method), a calque of English 'least-squares method'.