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19 changes: 19 additions & 0 deletions Doc/library/statistics.rst
Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,7 @@
.. testsetup:: *

from statistics import *
import math
__name__ = '<doctest>'

--------------
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*y = slope \* x + noise*

Continuing the example from :func:`correlation`, we look to see
how well a model based on major planets can predict the orbital
distances for dwarf planets:

.. doctest::

>>> model = linear_regression(period_squared, dist_cubed, proportional=True)
>>> slope = model.slope

>>> # Dwarf planets: Pluto, Eris, Makemake, Haumea, Ceres
>>> orbital_periods = [90_560, 204_199, 111_845, 103_410, 1_680] # days
>>> predicted_dist = [math.cbrt(slope * (p * p)) for p in orbital_periods]
>>> list(map(round, predicted_dist))
[5912, 10166, 6806, 6459, 414]

>>> [5_906, 10_152, 6_796, 6_450, 414] # actual distance in million km
[5906, 10152, 6796, 6450, 414]

.. versionadded:: 3.10

.. versionchanged:: 3.11
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