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normal distribution




In statistics, an ideal distribution which is symmetrical about its mean. It can be written in the form:

normal distribution

where f(x) is the relative frequency, σ is the standard deviation, μ is the mean, and π and e have their usual values. Note that in a normal distribution the mean, median, and mode coincide. The characteristic bell-shaped curve shown when f(x) is plotted against x is called the normal curve. The distribution is also known as the "Gaussian distribution" for Karl Gauss.


Related category

   • PROBABILITY AND STATISTICS