Definitions for root mean square

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Random House Webster's College Dictionary

root′ mean′ square′(n.)

  1. the square root of the arithmetic mean of the squares of the numbers in a given set of numbers.

    Category: Math

    Ref: Abbr.: rms 1

Wiktionary

  1. root mean square(Noun)

    The square root of the arithmetic mean of the squares.

Freebase

  1. Root mean square

    In mathematics, the root mean square, also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. It is especially useful when variates are positive and negative, e.g., sinusoids. RMS is used in various fields, including electrical engineering. It can be calculated for a series of discrete values or for a continuously varying function. Its name comes from its definition as the square root of the mean of the squares of the values. It is a special case of the generalized mean with the exponent p = 2.

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