Quadratic mean is useful indicator of many performance measurements. It is a square root of average of sum of square.

Other name: root mean sum of square or root mean square (RMS)

Formula:

Notes:

- Quadratic Mean is basically an Euclidean distance
- Quadratic Mean is a special case of Minkowski mean with parameter p = 2
- Quadratic Mean is a special case of Kolmogorov Generalized mean with base-function of h(x) = x
^{2}

Example:

Try the interactive program below to compute Quadratic mean. Feel free to change with your own input values.

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See also: Generalized Mean, Arithmetic mean, Geometric Mean

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**Preferable reference for this tutorial is**

Teknomo, Kardi (2015) Mean and Average. http:\\people.revoledu.com\kardi\ tutorial\BasicMath\Average\