Normal Distribution
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Normal Distribution
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The fundamental frequency distribution of statistical analysis. A
continuous variety x is said to have a normal distribution or to be
normally distributed if it possesses a density function f(x) which
satisfies the equation
where μ is the arithmetic mean (or first moment) and σ is the standard deviation. Also called
Gaussian distribution.
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About two-thirds of the total area under the curve is included between
x = μ - σ and x = μ + σ. The corresponding frequency distribution of
vectors is the normal circular distribution in which the frequencies of vector
deviations are represented by a series of circles centered on a vector mean.
When applied to error distribution, this function is the normal law of errors,
and the distribution is called the normal curve of error.
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use