IDAX.QNBINOM - Inverse negative binomial distribution

The QNBINOM function returns the value x of a variable that follows the negative binomial distribution for which the probability of being smaller or equal to x is equal to the specified percentage.

Syntax

IDAX.QNBINOM(DOUBLE percentage, INT8 s, DOUBLE p)

Parameter descriptions

percentage: Mandatory.; The requested limit of the percentage.; If percentage is not in the range of 0 - 1, QNBINOM(percentage,s,p) is null for all p values.; Min: 0.00000000001; Max: 0.99999999999; Data type: DOUBLE
s: Mandatory.; The number of successes that are required to stop the series of Bernoulli trials.; If s is 0 or less, QNBINOM(perc,s,p) is null for all perc values and p values.; Min: 1; Data type: INT8
p: Mandatory.; The probability of success.; If p is not in the range of 0 - 1, QNBINOM(percentage,s,p) is null for all percentage values and s values.; Min: 0.00000000001; Max: 1-0.00000000001; Data type: DOUBLE

If PNBINOM(x,s,p)=perc, QNBINOM(perc,s,p)=x for all positive x values and s values, and for p values in the range of 0 - 1.

Returned information

INT8 the point x, where PNBINOM(x,s,p)=percentage.