IDAX.QPOIS_H - High-tail inverse Poisson distribution

The QPOIS_H function returns the value x of a variable that follows the Poisson distribution for which the probability of being greater than x is equal to the specified percentage.

Syntax

IDAX.QPOIS_H(DOUBLE percentage, DOUBLE lambda)

Parameter descriptions

percentage: Mandatory.; The requested limit of the percentage.; If percentage is not in the range of 0 - 1, QPOIS_H(percentage,lambda) is null for all lambda values.; Min: 0.00000000001; Max: 0.99999999999; Data type: DOUBLE
lambda: Mandatory.; The mean number of successes within a specified time interval.; If lambda is 0 or less, PPOIS_H(x,lambda) is null for all x values.; Min: 0.00000000001; Data type: DOUBLE

QPOIS_H(perc,lambda) = QPOIS(1-perc,lambda) for all positive lambda values and for perc values in the range of 0 - 1.

If PPOIS_H(x,lambda)=perc, QPOIS_H(perc,lambda)=x for all positive x values and positive lambda values.

Returned information

INT8 the point x where PPOIS_H(x,lambda)=percentage.