IDAX.QCHISQ_H - High-tail inverse chi-square distribution

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

Syntax

IDAX.QCHISQ_H(DOUBLE percentage, INT8 df)

Parameter descriptions

percentage: Mandatory.; The requested limit of the percentage.; If percentage is not in the range of 0 - 1, QCHISQ_H(percentage,df) is null for all df values.; Min: 0.00000000001; Max: 0.99999999999; Data type: DOUBLE
df: Mandatory.; The number of degrees of freedom.; If df is 0 or less, QCHISQ_H(percentage,df) is null for all percentage values.; Min: 1; Data type: INT8

If PCHISQ_H(x,df)=perc, QCHISQ_H(perc,df)=perc.

QCHISQ_H(perc,df)=QCHISQ(1-perc,df) for df values greater than 0, and for perc values in the range of 0 - 1.

Returned information

DOUBLE the point x where PCHISQ_H(x,df)=percentage.