[docs] [issue36099] Clarify the difference between mu and xbar in the statistics documentation

[Steven D'Aprano]

New submission from Steven D'Aprano <steve+python at pearwood.info>:

The documentation isn't clear as to the difference between mu and xbar, and why one is used in variance and the other in pvariance.

See #36018 for discussion.

For the record: mu or μ is the population parameter, i.e. the mean of the entire population, if you could average every individual. xbar or x̅  is the mean of a sample.

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assignee: docs at python
components: Documentation
messages: 336424
nosy: docs at python, steven.daprano
priority: normal
severity: normal
status: open
title: Clarify the difference between mu and xbar in the statistics documentation
type: behavior
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36099>
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