IDAX.QCHISQ - Inverse chi-square distribution

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

Syntax

IDAX.QCHISQ(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(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(percentage,df) is null for all percentage values.; Min: 1; Data type: INT8

If PCHISQ(x,df)=perc, QCHISQ(perc,df)=x.

Returned information

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