public class Stats {
    
    /**
     * Returns the maximum of an int array.
     * @param a
     */
    public static int maximum(int[] a)
    {
        int max = Integer.MIN_VALUE;
        for(int i = 0; i < a.length; i++) {
            if ( a[i] > max ) {
                max = a[i];
            }
        }
        return max;
    }
    
    /**
     * Returns the mean (average) of values in an integer array
     * @param a - the array
     * @return the mean value of the array members
     */
    public static double mean(int[] a)
    {
        double sum = 0.0;
        for(int i = 0; i < a.length; i++) {
            sum += a[i];
        }
        return sum / a.length;
    }
}