>>> statistics.pstdev([1.5, 2.5, 2.5, 2.75, 3.25, 4.75])
0.986893273527251
>>> statistics.pstdev(range...>>> statistics.pvariance([1.5, 2.5, 2.5, 2.75, 3.25, 4.75])
0.9739583333333334
>>> statistics.pvariance...([1, 2, 3, 4, 5, 10, 9, 8, 7, 6])
8.25
>>> x = [1, 2, 3, 4, 5, 10, 9, 8, 7, 6]
>>> mu = statistics.mean..., 9, 8, 7, 6])
9.166666666666666
>>> statistics.stdev([1, 2, 3, 4, 5, 10, 9, 8, 7, 6])
3.0276503540974917...>>> statistics.variance([1.5, 2.5, 2.5, 2.75, 3.25, 4.75])
1.16875
>>> statistics.stdev([1.5, 2.5, 2.5