Normal frequency distribution

A normal frequency distribution is a continuous, symmetrical, bell-shaped distribution function. Its mean, mode and median are all the same; and both the tails of the bell curve are infinitely long.

Because of its symmetry, a normal frequency distribution can be described fully by its mean and its standard deviation.

Commonly abbreviated to normal distribution.

See also

• Binomial
• Frequency distribution
• Kurtosis
• Leptokurtic frequency distribution
• Lognormal frequency distribution
• Mean
• Standard deviation
• Standardised normal distribution