AoPSWiki
Looking for a challenging geometry text? Preparing for MATHCOUNTS or the AMC exams? Check out Art of Problem Solving's Introduction to Geometry by Richard Rusczyk.
Personal tools

Root-mean-square

From AoPSWiki

(Redirected from Quadratic mean)

The root-mean-square or quadratic mean of a collection of real numbers is defined to be \sqrt{\frac{x^2_1+x^2_2+\dots+x^2_n}{n}}. This is the second power mean of the .

It is so-named because it is the square root of the mean of the squares of the .

See Also


This article is a stub. Help us out by expanding it.

Retrieved from "http://www.artofproblemsolving.com/Wiki/index.php/Root-mean-square"
Looking for a challenging algebra text? Preparing for MATHCOUNTS or the AMC exams?
Check out Art of Problem Solving's Introduction to Algebra by Richard Rusczyk.
© Copyright 2008 AoPS Incorporated. All Rights Reserved. • Foundation • Privacy • Contact Us