Approximate CDF from PDF

[The-Ludwig]

• make the description of the approximate CDF more precise
• provide an example of how to generate an approximate CDF from a given PDF
• comments out 2 lines so the notebook throws no errors (both related to the jacobi example)

[HDembinski]

Hi @The-Ludwig I like the tutorial, but I think we should make it a separate short tutorial instead of embedding in the already very long cost_funtions.ipynb.

[HDembinski]

@The-Ludwig Let's not touch this branch for now, I am working on a different solution. I also reworked the notebook that you changed, so I will merge this PR at some point.

If you want to work on something, you could make a new notebook which showcases the different ways of computing an cdf (approximate or with numerical integration) and showcase the pros and cons. You could explore the bias introduced by the approximate cdf and compare run-times. That would be really helpful