scipy.stats.Mixture.

variance

Mixture.variance(*, method=None)

Variance (central second moment)

Parameters:

method{None, ‘formula’, ‘transform’, ‘normalize’, ‘quadrature’, ‘cache’}

Method used to calculate the central second moment. Not all methods are available for all distributions. See moment for details.

See also

moment

standard_deviation

mean

References

[1]

Variance, Wikipedia, https://en.wikipedia.org/wiki/Variance#Absolutely_continuous_random_variable

Examples

Try it in your browser!

Instantiate a distribution with the desired parameters:

>>> from scipy import stats
>>> X = stats.Normal(mu=1., sigma=2.)

Evaluate the variance:

>>> X.variance()
4.0
>>> X.variance() == X.moment(order=2, kind='central') == X.sigma**2
True

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