[issue40331] Increase test coverage for the statistics module

Change by Tzanetos Balitsaris : -- keywords: +patch pull_requests: +18941 stage: -> patch review pull_request: https://github.com/python/cpython/pull/19608 ___ Python tracker <https://bugs.python.org/issu

[issue40331] Increase test coverage for the statistics module

New submission from Tzanetos Balitsaris : The statistics module is already highly tested but it seems that there are 4 statements [0] that are not executed by the equivalent unit tests. Specifically, 3 statements which are part of the `_convert`, `_find_lteq`, and `_find_rteq` functions