Difference between revisions of "Root-mean-square"
m (Root-mean square moved to Root-mean-square) |
m |
||
Line 1: | Line 1: | ||
− | The '''root-mean square''' or ''quadratic mean'' of a collection of [[real number]]s <math>x_1,\dots , x_n</math> is defined to be <math>\sqrt{\frac{x^2_1+x^2_2+\dots+x^2_n}{n}}</math>. This is the second [[power mean]] of the <math>x_i</math>. | + | The '''root-mean-square''' or ''quadratic mean'' of a collection of [[real number]]s <math>x_1,\dots , x_n</math> is defined to be <math>\sqrt{\frac{x^2_1+x^2_2+\dots+x^2_n}{n}}</math>. This is the second [[power mean]] of the <math>x_i</math>. |
+ | It is so-named because it is the square root of the mean of the squares of the <math>x_i</math>. | ||
== See Also == | == See Also == |
Revision as of 19:06, 16 July 2007
The root-mean-square or quadratic mean of a collection of real numbers is defined to be . 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.