quadratic mean

== English == === Etymology === Quadratic in the phrase refers to the squaring on the terms. === Noun === quadratic mean (plural quadratic means) (mathematics) A type of average, calculated as the square root of the mean of the squares, i.e. Q = x 1 2 + x 2 2 + . . . + x n 2 n {\displaystyle Q={\sqrt {x_{1}^{2}+x_{2}^{2}+...+x_{n}^{2} \over n}}} . Synonyms: root mean square, RMS, rms Hypernyms: mean (broad sense), average (broad sense), measure of central tendency Coordinate terms: arithmetic mean, geometric mean, harmonic mean ==== Translations ====