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13 changes: 0 additions & 13 deletions Doc/library/statistics.rst
Original file line number Diff line number Diff line change
Expand Up @@ -103,19 +103,6 @@ However, for reading convenience, most of the examples show sorted sequences.
>>> mean([D("0.5"), D("0.75"), D("0.625"), D("0.375")])
Decimal('0.5625')

.. note::

The mean is strongly affected by outliers and is not a robust estimator
for central location: the mean is not necessarily a typical example of
the data points. For more robust measures of central location, see
:func:`median` and :func:`mode`.

The sample mean gives an unbiased estimate of the true population mean,
so that when taken on average over all the possible samples,
``mean(sample)`` converges on the true mean of the entire population. If
*data* represents the entire population rather than a sample, then
``mean(data)`` is equivalent to calculating the true population mean μ.


.. function:: fmean(data)

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