docs: improve stats/base/dists/lognormal README Examples

[meddhiaka]

Resolves # .

Description

What is the purpose of this pull request?
I updated improved the documentation of the README examples of stats/base/dists/lognormal namespace, with providing examples of using the functions inside that directory, also the expected return of every possible function

This pull request:

• a
• b
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Related Issues

Does this pull request have any related issues?

This pull request:

• resolves #
• fixes [RFC]: improve README examples of stats/base/dists/lognormal namespace #1636

Questions

Any questions for reviewers of this pull request?

I'm waiting for reviewers comment ASAP, I'm interested in contributing to this repository so bad, so any advices or comments would be appreciated!

Other

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No.

Checklist

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• Read, understood, and followed the contributing guidelines.

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