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bpo-36018: Update example to show mean and stdev properties #13047

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May 2, 2019
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bpo-36018: Update example to show mean and stdev properties #13047

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10 changes: 6 additions & 4 deletions Doc/whatsnew/3.8.rst
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Expand Up @@ -424,17 +424,19 @@ and manipulating normal distributions of a random variable.
::

>>> temperature_feb = NormalDist.from_samples([4, 12, -3, 2, 7, 14])
>>> temperature_feb
NormalDist(mu=6.0, sigma=6.356099432828281)
>>> temperature_feb.mean
6.0
>>> temperature_feb.stdev
6.356099432828281

>>> temperature_feb.cdf(3) # Chance of being under 3 degrees
0.3184678262814532
>>> # Relative chance of being 7 degrees versus 10 degrees
>>> temperature_feb.pdf(7) / temperature_feb.pdf(10)
1.2039930378537762

>>> el_nino = NormalDist(4, 2.5)
>>> temperature_feb += el_nino # Add in a climate effect
>>> el_niño = NormalDist(4, 2.5)
>>> temperature_feb += el_niño # Add in a climate effect
>>> temperature_feb
NormalDist(mu=10.0, sigma=6.830080526611674)

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