HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 410)

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101

POISSON_CDF(4,2) returns 0.238103305554.

Probability – Inverse

Normal

Inverse cumulative normal distribution function. Returns the cumulative normal distribution value associated

with the lower-tail probability, p, given the mean, μ, and standard deviation, σ, of a normal distribution. If only

one argument is supplied, it is taken as p, and the assumption is that μ=0 and σ=1.

NORMALD_ICDF([μ,σ,]p)

Example:

NORMALD_ICDF(0,1,0.841344746069) returns 1.

Inverse cumulative Student's t distribution function. Returns the value x such that the Student's-t lower-tail

probability of x, with n degrees of freedom, is p.

STUDENT_ICDF(n,p)

Example:

STUDENT_ICDF(3,0.0246659214814) returns –3.2.

Inverse cumulative χ

distribution function. Returns the value χ such that the χ

lower-tail probability of χ,

with n degrees of freedom, is p.

CHISQUARE_ICDF(n,p)

Example:

CHISQUARE_ICDF(2, 0.957147873133) returns 6.3.

Inverse cumulative Fisher distribution function. Returns the value x such that the Fisher lower-tail probability

of x, with numerator n and denominator d degrees of freedom, is p.

FISHER_ICDF(n,d,p)

Example:

FISHER_ICDF(5,5,0.76748868087) returns 2.

Binomial

Inverse cumulative binomial distribution function. Returns the number of successes, k, out of n trials, each

with a probability of p, such that the probability of k or fewer successes is q.

BINOMIAL_ICDF(n,p,q)

Example:

BINOMIAL_ICDF(20,0.5,0.6) returns 11.

362 Chapter 22 Functions and commands

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