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NTWEIBULLINV

Returns the inverse of the cumulative distribution function for a specified Weibull distribution.

Syntax

NTWEIBULLINV(

• prob,
• Alpha,
• Beta

)

Parameters

• prob is a probability corresponding to the normal distribution.
• Alpha is a parameter of the distribution $\alpha\;(>0)$.
• Beta is a parameter of the distribution $\beta\;(>0)$.

Remarks

The return value x for probability P is

$x=\alpha\left(-\log P\right)^{1/\beta}$

Example

• The example may be easier to understand if you copy it to a blank worksheet

How to copy an example

1. Create a blank workbook or worksheet.
2. Select the example in the Help topic.

Note  Do not select the row or column headers.

Selecting an example from Help

3. Press CTRL+C.
4. In the worksheet, select cell A1, and press CTRL+V.
5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Tools menu, point to Formula Auditing, and then click Formula Auditing Mode.

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A B
Data Description
0.5 Probability associated with the Weibull distribution
1.7 Value of parameter Alpha
0.9 Value of parameter Beta
Formula Description (Result)
=NTWEIBULLINV(A2,A3,A4) Inverse of the cumulative distribution function for the terms above