from typing import List
import statistics


def standard_deviation(data: List):
    """
    Calculate the sample `standard deviation (SD)
    <https://en.wikipedia.org/wiki/Standard_deviation/>`_.

    Parameters
    ----------

    data: List
        List of data points.

    Returns
    -------

    sd: float
        The standard deviation of the data points.
    """

    sd = statistics.stdev(data)
    return sd