root mean square

noun Mathematics.
the square root of the arithmetic mean of the squares of the numbers in a given set of numbers. Abbreviation: rms

Origin:
1890–95

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root mean square
 
n
rms the square root of the average of the squares of a set of numbers or quantities: the root mean square of 1, 2, and 4 is √[(1² + 2² + 4²)/3] = √7

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Example sentences
The root mean square error of approximation values was robust in the presence of kurtosis for the elliptical estimation methods.
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