standardDeviation method
Returns the square root of the (population) variance of this Iterable, or double.nan if the iterable contains less than 2 (1 for population variance) values.
For details, see https://en.wikipedia.org/wiki/Standard_deviation.
Example: [2, 5].standardDeviation()
returns 2.1213...
.
Implementation
double standardDeviation({bool population = false}) =>
sqrt(variance(population: population));