bundles / scipy 1.17.1 / scipy / stats / _probability_distribution / _ProbabilityDistribution / variance

function

`scipy.stats._probability_distribution:_ProbabilityDistribution.variance`

source: /scipy/stats/_probability_distribution.py :539

Signature

def variance ( self , * , method )

Summary

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.

Examples

Instantiate a distribution with the desired parameters:

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

✓

Evaluate the variance:

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

✗

See also

mean
moment
standard_deviation

Aliases

scipy.stats._distribution_infrastructure._ProbabilityDistribution.variance