# CV% of Eta estimates

**URL:** <https://forum.certara.com/t/cv-of-eta-estimates/3568>\
**Category:** Modelling and Simulation\
**Created:** [September 26, 2021, 1:41am UTC](https://forum.certara.com/t/cv-of-eta-estimates/3568 "2021-09-26T01:41:16Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![davidq8](https://avatars.discourse-cdn.com/v4/letter/d/90ced4/32.png) [@davidq8](https://forum.certara.com/u/davidq8)\
**Post date:** [September 26, 2021, 1:41am UTC](https://forum.certara.com/t/cv-of-eta-estimates/3568/1 "2021-09-26T01:41:16Z")

</div>

Hi

I see the software doesn’t show CV% of Eta estimates only for theta. My question how can I calculate it?

Thanks

---

<div class="post-metadata">

**Author:** ![kniefort](https://avatars.discourse-cdn.com/v4/letter/k/c68b51/32.png) [@kniefort](https://forum.certara.com/u/kniefort)\
**Post date:** [September 26, 2021, 2:06pm UTC](https://forum.certara.com/t/cv-of-eta-estimates/3568/2 "2021-09-26T14:06:54Z")

</div>

Hi,

The CV reported in the Theta table is calculated by dividing the standard error of the parameter estimate by the parameter estimate itself and multiplying by 100. Likewise, CV for the omegas can be calculated by dividing the standard error of the omega estimates (reported in OmegaStderr) by the omega estimates (reported in Omega) and multiplying by 100.

Keith

---

<div class="post-metadata">

**Author:** ![davidq8](https://avatars.discourse-cdn.com/v4/letter/d/90ced4/32.png) [@davidq8](https://forum.certara.com/u/davidq8)\
**Post date:** [December 7, 2021, 12:10am UTC](https://forum.certara.com/t/cv-of-eta-estimates/3568/3 "2021-12-07T00:10:40Z")

</div>

Thanks Keith for your reply. You answer was very helpful.