HP 39gII, Руководство пользователя

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164 Using mathematical functions
chisquare
probability density function. Computes the probability
density of the distribution at x, given n degrees of
freedom.
chisquare
( n , x )
Example:
chisquare
(2, 3.2) returns
0.100948258997
.
chisquare_cdf
Cumulative distribution function. Returns the lower-tail
probability of the probability density function for the
value x, given n degrees of freedom.
chisquare_cdf
( n , k )
Example:
chisquare_cdf
(2, 6.1) returns
0.952641075609
.
chisquare_icdf
Inverse cumulative distribution function. Returns the
value x such that the lower-tail probability of x, with n
degrees of freedom, is p .
chisquare_icdf
( n , p )
Example:
chisquare_icdf
(2, 0.952641075609) returns
6.1
.
fisher
Fisher (or Fisher-Snedecor) probability density function.
Computes the probability density at the value x, given
numerator n and denominator d degrees of freedom.
fisher
( n , d , x )
Example:
fisher
(5, 5, 2) returns
0.158080231095
.
fisher_cdf
Cumulative Fisher distribution function. Returns the lower-
tail probability of the Fisher probability density function
for the value x, given numerator n and denominator d
degrees of freedom.
fisher_cdf
( n , d , x )
Example:
fisher_cdf
(5, 5, 2) returns
0.76748868087
.
χ
2
χ
2
χ
2
χ
2
χ
2
χ
2