Tests

   After the usual initiatory tests, the calculation of the median was checked first. For this, three different cases have been distinguished:

1. An even, positive number of arguments was used. In this case, the result has to be the average of the two elements which are in the middle of the sorted list of arguments.
2. An odd number of arguments was used. In this case, the result has to be equal to the element in the middle of the sorted list of arguments.
3. An empty list of arguments should not influence the total result of the statistic.

Some test cases for all three groups have been designed, but no bug  could be found.

The rest of the statistic is only sorting numeric values, and dividing them into different groups which can be found in the manual [Holl96] on page 63. Since this are typical tasks for a database , the majority of the remaining tests done for this statistic were several volume tests , but except some discrepancies between the coded product and the manual  which are listed in chapter  on page  no bugs could be found.