This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


represents a chi^2 distribution with degrees of freedom.
  • The probability density for value x in a chi^2 distribution is proportional to x^(nu/2-1)ⅇ^(-x/2) for x>0, and is zero for x<0. »
  • For integer , the chi^2 distribution with degrees of freedom gives the distribution of sums of squares of values sampled from a normal distribution.
New in 6