1.求众数和极差：21, 41, 29, 29, 38, 28, 49, 29
2.求众数和极差：39, 44, 48, 35, 39, 46, 22, 39
3.求众数和极差：29, 29, 13, 28, 30, 29, 18, 50
4.求众数和极差：33, 16, 41, 26, 19, 19, 19, 38
5.求众数和极差：14, 15, 48, 14, 49, 14, 36, 30
6.求众数和极差：35, 28, 18, 34, 34, 31, 34, 46
7.求众数和极差：26, 21, 42, 38, 12, 31, 31, 31
8.求众数和极差：15, 21, 21, 41, 25, 21, 17, 34
9.求众数和极差：43, 30, 37, 37, 46, 29, 37, 10
10.求众数和极差：39, 44, 47, 13, 44, 43, 28, 44
11.求众数和极差：16, 18, 23, 40, 13, 13, 27, 13
12.求众数和极差：37, 20, 36, 23, 40, 36, 36, 29