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NTCHISKEW

Returns skewness of a specified chi distribution.

Syntax

NTCHISKEW(

N

)

Parameters

N is a parameter of the distribution $N$ (Positive integer).

Remarks

The skewness of the distribution is given as:

$\frac{\mu(3)-3\mu(2)\mu(1)+2\mu^3(1)}{\sigma^3}$

$\mu(r)=\frac{2^{\frac{r}{2}}\Gamma\left(\frac{N+r}{2}\right)}{\Gamma\left(\frac{N}{2}\right)}$

, where $\sigma$ is standard deviation and $\Gamma(\cdot)$ is gamma function.

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

8 Value of parameter Alpha

Formula Description (Result)

=NTCHISKEW(A2) Skewness of the distribution for the terms above

See also

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