As a DS user, I want my notebooks to automatically have important packages I need for my projects, so I don't have to manually install the most commonly used packages. 

Scikit-learn is one of the most popular Python packages and is commonly used in machine learning use cases: https://blog.jetbrains.com/datalore/2020/12/17/we-downloaded-10-000-000-jupyter-notebooks-from-github-this-is-what-we-learned/ 

This story is to add scikit-learn as a supported package for all RH notebook images except minimal Python.