Fix/131 Mean to another fun name

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.95%. Comparing base (4c18ffa) to head (a0d7665).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #135 +/- ## ======================================= Coverage 83.95% 83.95% ======================================= Files 10 10 Lines 561 561 ======================================= Hits 471 471 Misses 90 90 ```

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[daroczig]

thanks :bow: