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# sciPy stats.bayes_mvs() function | Python

• Last Updated : 18 Feb, 2019

scipy.stats.bayes_mvs(arr, alpha) function computes mean, variance and standard deviation in the given Bayesian confidence interval.

Parameters :
arr : [array_like] The input data can be multidimensional but will be flattened before use.
alpha : Probability that the returned confidence interval contains the true parameter.

Results : mean, variance and standard deviation in the given Bayesian confidence interval.

Code #1: Working

 `# stats.bayes_mvs() method   ``import` `numpy as np``from` `scipy ``import` `stats``   ` `arr1 ``=` `[[``20``, ``2``, ``7``, ``1``, ``34``],``        ``[``50``, ``12``, ``12``, ``34``, ``4``]]`` ` `arr2 ``=` `[``50``, ``12``, ``12``, ``34``, ``4``]`` ` `print` `(``"\narr1 : "``, arr1)``print` `(``"\narr2 : "``, arr2)`` ` `mean, var, std ``=` `stats.bayes_mvs(arr1, ``0.9``)`` ` `print` `(``"\nMean of array1 : "``, mean)``print` `(``"\nvar of array1 : "``, var)``print` `(``"\nstd of array1 : "``, std)`` ` `mean, var, std ``=` `stats.bayes_mvs(arr2, ``0.5``)`` ` `print` `(``"\nMean of array2 : "``, mean)``print` `(``"\nvar of array2 : "``, var)``print` `(``"\nstd of array2 : "``, std)`` `

Output :

arr1 : [[20, 2, 7, 1, 34], [50, 12, 12, 34, 4]]

arr2 : [50, 12, 12, 34, 4]

Mean of array1 : Mean(statistic=17.6, minmax=(7.99212522273964, 27.207874777260358))

var of array1 : Variance(statistic=353.2, minmax=(146.13176149159307, 743.5537128176551))

std of array1 : Std_dev(statistic=18.136411760663574, minmax=(12.088497073316974, 27.26818132581737))

Mean of array2 : Mean(statistic=22.4, minmax=(16.090582413339323, 28.709417586660674))

var of array2 : Variance(statistic=725.6, minmax=(269.47585801746374, 754.8278687119639))

std of array2 : Std_dev(statistic=23.872262300862655, minmax=(16.415719844632576, 27.474130900029646))

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