i need help with this question

12.11 The number of disk I/O's performed by a number of programs were measured as follows: (23, 33, 14, 15, 42, 28, 33, 45, 23, 34, 39, 21, 36, 23, 34, 36, 25, 9,11, 19, 35, 24, 31, 29, 16, 23, 34, 24, 38, 15, 13, 35, 283. Which index of central tendency would you choose and why