Use a random n / alpha in the bass notebook

[williambdean]

Description

Related Issue

• Closes #
• Related to #

Checklist

• Checked that the pre-commit linting/style checks pass. Feel free to comment pre-commit.ci autofix to auto-fix.
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks) using numpydoc format.
• If you are a pro: each commit corresponds to a relevant logical change

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📚 Documentation preview 📚: https://pymc-marketing--1848.org.readthedocs.build/en/1848/

[review-notebook-app]

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[williambdean]

CC: @cluhmann

[cluhmann]

We ( @AGxData ) will open a separate PR and then we can compare and contrast.