@@ -0,0 +1,355 @@
+/**%0A * This is the interface of all Mean calculation functions.%0A */%0Apublic interface MeanFunction %7B%0A    /**%0A     * Calculate the mean of the given observations set%0A     * @param data the data set%0A     * @return a double array representing the mean of the given data set.%0A     */%0A    double%5B%5D compute(final double%5B%5D%5B%5D data) throws EmptyDataSetException;%0A%7D%0A

create MeanFunction interface