HP 39g+ - Manual (Page 150)

10-14 Using mathematical functions
H I N T The setting of Time will be different for each calculator, so
using RANDSEED(Time) is guaranteed to produce a set of
numbers which are as close to random as possible. You can set
the seed using the command RANDSEED.
UTPC Upper-Tail Chi-Squared Probability given degrees of
freedom, evaluated at value. Returns the probability that a
χ 2
random variable is greater than value.
UTPC (degrees,value)
UTPF Upper-Tail Snedecor’s F Probability given numerator
degrees of freedom and denominator degrees of freedom (of
the F distribution), evaluated at value. Returns the probability
that a Snedecor's F random variable is greater than value.
UTPF (numerator,denominator,value)
UTPN Upper-Tail Normal Probability given mean and variance,
evaluated at value. Returns the probability that a normal
random variable is greater than value for a normal
distribution. Note: The variance is the square of the standard
deviation.
UTPN (mean,variance,value)
UTPT Upper-Tail Student’s t-Probability given degrees of freedom,
evaluated at value. Returns the probability that the Student's t-
random variable is greater than value.
UTPT (degrees,value)