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normal distribution

noun, Statistics.
a theoretical frequency distribution represented by a normal curve.
Also called Gaussian distribution.
Origin of normal distribution
1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for normal distribution
  • Innovations to this process are drawn randomly each period from a normal distribution.
  • But he had problems fitting people's heights and weights in a population into such a normal distribution.
  • Kurtosis is a measure of whether the data are peaked or flat relative to a normal distribution.
  • In all cases, the chi-square test was applied to test for a normal distribution.
  • The normal distribution is widely used to model uncertain variables such as population characteristics.
  • The normal distribution appears to be a good model for these data.
  • The normal distribution is not a good model for these data.
  • Standard control charts for continuous measurements, for instance, require that the data come from a normal distribution.
  • The following is the plot of the normal distribution hazard function.
British Dictionary definitions for normal distribution

normal distribution

(statistics) a continuous distribution of a random variable with its mean, median, and mode equal, the probability density function of which is given by (exp-[(x–μ)²/2σ²]/σ√(2π)) where μ is the mean and σ² the variance Also called Gaussian distribution
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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normal distribution in Science
normal distribution
A theoretical frequency distribution for a set of variable data, usually represented by a bell-shaped curve symmetrical about the mean.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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normal distribution in Technology

(Or "Gaussian distribution") The frequency distribution of many natural phenomena such as the height or intelligence of people of a certain age and sex. The formula looks something like:
P(x) = e^(((x-m)/s)^2)
where P(x) is the probability of a measurement x, m is the mean value of x and s is the standard deviation.
Also known as a "bell curve" because of its shape.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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