DADiSP Worksheet Functions > Function Categories > Statistics and Calculus > IVSNORMPB
Returns the corresponding z value for the input, a probability value, based on the normal probability distribution function. See the preferred INVPROBN function.
IVSNORMPB(prob)
prob |
- |
A real, the probability value between 0 and 1.0. |
ivsnormpb(0.1)
returns 0.2533, the z value for a probability of 0.10.
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.