get population kurtosis of given collection of numbers

Parameters

kurtosis collection :block

Attributes

Returns

Examples

copy
arr:  [1 2 3 4]
arr2: [3 120 4 7 87 2 6 34]

print kurtosis arr          ; -1.36
print kurtosis arr2         ; -0.3863717894076322

kurtosis.sample arr         ; => -1.200000000000001
kurtosis.sample arr2        ; => 0.5886192422439724

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