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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.

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

From Textbooks • Feb. 14, 2019

The root mean square speed of H2 molecules at 25 °C is about 1.6 km/s.

From Textbooks • Feb. 14, 2019

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

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