### 15.11 NPAR TESTS

    NPAR TESTS

         nonparametric test subcommands
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         [ /STATISTICS={DESCRIPTIVES} ]

         [ /MISSING={ANALYSIS, LISTWISE} {INCLUDE, EXCLUDE} ]

         [ /METHOD=EXACT [ TIMER [(n)] ] ]

`NPAR TESTS` performs nonparametric tests. Non parametric tests make very few assumptions about the distribution of the data. One or more tests may be specified by using the corresponding subcommand. If the `/STATISTICS` subcommand is also specified, then summary statistics are produces for each variable that is the subject of any test.

Certain tests may take a long time to execute, if an exact figure is required. Therefore, by default asymptotic approximations are used unless the subcommand `/METHOD=EXACT` is specified. Exact tests give more accurate results, but may take an unacceptably long time to perform. If the `TIMER` keyword is used, it sets a maximum time, after which the test will be abandoned, and a warning message printed. The time, in minutes, should be specified in parentheses after the `TIMER` keyword. If the `TIMER` keyword is given without this figure, then a default value of 5 minutes is used.