Blurb::
Specifies two-sided order statistics (an interval) to be used when
determining sample sizes for random sampling using Wilks order statistics.
Description::
This option causes the sample size to be based on the interval defined by
the lowest N and uppermost N outputs for order N statistics (default N=1).

*Default Behavior*
The default for Wilks is one_sided_upper.
Topics::

Examples::

.. code-block::

    method
      sampling
        sample_type random
        wilks
          two_sided


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