> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Std dev hypothetical PL

<Badge color="gray" size="lg">[model\_eligibility](../tags/model_eligibility)</Badge>

|                 |                                                                                                                                             |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------- |
| **Description** | The standard deviation of hypothetical PL                                                                                                   |
| **Reference**   | [\[MAR32.38\]](https://www.bis.org/basel_framework/chapter/MAR/32.htm?inforce=20230101\&published=20200327#paragraph_MAR_32_20230101_32_38) |
| **Formula**     | $\displaystyle stdev = \sqrt{\frac{\sum(x - \bar{x})^2}{n}}$                                                                                |

The measure is computed based on the **Hypothetical PL** measure.