1.求众数和极差：12, 14, 39, 33, 39, 39, 28, 36
2.求众数和极差：28, 28, 41, 12, 27, 36, 40, 28
3.求众数和极差：31, 28, 23, 23, 24, 23, 35, 41
4.求众数和极差：49, 38, 20, 40, 47, 47, 11, 47
5.求众数和极差：50, 42, 39, 23, 29, 23, 23, 47
6.求众数和极差：43, 26, 26, 26, 33, 21, 18, 34
7.求众数和极差：15, 18, 11, 26, 18, 18, 10, 33
8.求众数和极差：27, 41, 27, 27, 30, 43, 33, 32
9.求众数和极差：39, 43, 33, 41, 45, 41, 31, 41
10.求众数和极差：49, 25, 24, 48, 24, 24, 47, 26
11.求众数和极差：36, 21, 27, 17, 44, 21, 21, 10
12.求众数和极差：26, 33, 33, 17, 33, 35, 38, 29