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The PAIRS subcommand introduces Paired Samples mode.
Use this mode when repeated measures have been taken from the same
samples.
If the WITH keyword is omitted, then tables for all
combinations of variables given in the PAIRS subcommand are
generated.
If the WITH keyword is given, and the (PAIRED) keyword
is also given, then the number of variables preceding WITH
must be the same as the number following it.
In this case, tables for each respective pair of variables are
generated.
In the event that the WITH keyword is given, but the
(PAIRED) keyword is omitted, then tables for each combination
of variable preceding WITH against variable following
WITH are generated.