IVSNORMPB

Purpose:

Returns the corresponding z value for the input, a probability value, based on the normal probability distribution function. See the preferred INVPROBN function.

Syntax:

IVSNORMPB(prob)

prob

-

A real, the probability value between 0 and 1.0.

Example:

ivsnormpb(0.1)

 

returns 0.2533, the z value for a probability of 0.10.

Remarks:

The preferred INVPROBN function employs a faster and more accurate algorithm of calculating the inverse normal cumulative distribution function.

 

For 0.5 <= z < 1.0, invprobn(z) == ivsnormpb(z 0.5) approximately.

See Also:

A2STD

CNF2STD

INVPROBN

PDFNORM

PROBN