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mean square

American  

noun

Statistics.
  1. the mean of the squares of a set of numbers.


Etymology

Origin of mean square

First recorded in 1835–45

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In the KMT, the root mean square speed of a particle, urms, is defined as the square root of the average of the squares of the speeds with n = the number of particles:

From Textbooks • Feb. 14, 2019

What is the effect on the root mean square speed of the molecules?

From Textbooks • Feb. 14, 2019

What is the root mean square speed of a N2 molecule at 25 °C?

From Textbooks • Feb. 14, 2019

Note that the most probable speed, νp, is a little less than 400 m/s, while the root mean square speed, urms, is closer to 500 m/s.

From Textbooks • Feb. 14, 2019

R� = the mean square of the radii of the figure.

From Scientific American Supplement, No. 1082, September 26, 1896 by Various