1.求众数和极差：1, 19, 10, 18, 12, 19, 10, 15
2.求众数和极差：17, 1, 1, 15, 19, 12, 16, 12
3.求众数和极差：5, 4, 16, 8, 6, 6, 19, 16
4.求众数和极差：8, 1, 8, 1, 12, 16, 11, 20
5.求众数和极差：18, 18, 3, 12, 4, 5, 3, 20
6.求众数和极差：20, 19, 10, 3, 3, 8, 8, 9
7.求众数和极差：10, 4, 5, 2, 5, 4, 20, 15
8.求众数和极差：6, 4, 10, 10, 17, 2, 13, 13
9.求众数和极差：11, 4, 18, 4, 9, 10, 10, 12
10.求众数和极差：17, 10, 16, 15, 2, 6, 17, 6
11.求众数和极差：7, 9, 9, 5, 4, 13, 13, 10
12.求众数和极差：16, 14, 14, 13, 13, 15, 17, 1