# normal distribution

- a theoretical frequency distribution represented by a normal curve.

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## Origin of normal distribution

First recorded in 1895–1900

Also called Gaussian distribution.

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## 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 varianceAlso called: Gaussian distribution

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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

## normal distribution

[nôr′məl]

- A theoretical frequency distribution for a set of variable data, usually represented by a bell-shaped curve symmetrical about the mean.

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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.