Function for generating values from chi-square distributions.

Interface

chisq(n:int) : real

where n>=1. It returns a drawing from a chi-square distribution with
n degrees of freedom.

The sum of the squares of n independent normally distributed random
variables with mean 0.0 and standard deviation 1.0 is a chi-squared distribution with n degrees of freedom.

It raises Chisq exception if n<1.

Characteristics

  • Mean: n
  • Variance: 2n

Density functions for chi-square distributions:

Density functions for chi-square distributions

Density functions for chi-square distributions

Example

An example for this distribution has been omitted because it is rarely found in nature. Instead, the distribution is used when doing statistical tests.

Related pages

Random distribution functions

Discrete
Binomial

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