# Least Squares Definition

noun

A method of determining the curve that best describes the relationship between expected and observed sets of data by minimizing the sums of the squares of deviation between observed and expected values.

American Heritage

A statistical method used to find the curve that most closely approximates a set of data: it is based on minimizing the sum of the squares of the differences between expected and observed values of the data.

Webster's New World

Synonyms:

- method of least squares

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