bench: refactor number generation

[hrshya]

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Resolves #5145 .

Description

What is the purpose of this pull request?

This pull request:

• Fixes the benchmarks in the exponential directory.

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves no related issues.

Questions

Any questions for reviewers of this pull request?

No.

Other

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No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

---

@stdlib-js/reviewers

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/base/dists/exponential/cdf	$\color{green}275/275$ $\color{green}+100.00\%$	$\color{green}20/20$ $\color{green}+100.00\%$	$\color{green}4/4$ $\color{green}+100.00\%$	$\color{green}275/275$ $\color{green}+100.00\%$

The above coverage report was generated for the changes in this PR.

[Planeshifter]

Thanks!

[stdlib-bot]

PR Commit Message

bench: refactor number generation

PR-URL: https://github.com/stdlib-js/stdlib/pull/5212
Closes: https://github.com/stdlib-js/stdlib/issues/5145

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Please review the above commit message and make any necessary adjustments.