TITLE(Chisquare @@ The Chi-Square Distribution)
USAGE(
dchisq(x, df)
pchisq(q, df)
qchisq(p, df)
rchisq(n, df)
)
ALIAS(dchisq)
ALIAS(pchisq)
ALIAS(qchisq)
ALIAS(rchisq)
VALUE(
These functions provide information about the chi-square distribution
with LANG(df) degrees of freedom.  LANG(dchisq) gives the density,
LANG(pchisq) gives the distribution function LANG(qchisq) gives
the quantile function and LANG(rchisq) generates random deviates.
PARA
The chi-square distribution with LANG(df) EQN(= n) degrees of freedom has density
DEQN(f(x) =
OVER(1 @@ SUP(2@@n/2) greekGamma (n/2))
SUP(x@@n/2-1) SUP(e@@-x/2)
@@f(x) = 1 / (2^(n/2) Gamma(n/2))  x^(n/2-1) e^(-x/2))
for EQN(x GT 0).
)
