17, 18, 18, 18, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22,
22, 22, 22, 23,23,
24,24,24,24,24,24,24,24,25,26,26,26,26,26,26,27,27,27,27,27,28,28,29,31,31,32,32,34,35,38
use the data to do the following: 1. sample mean 2. median 3. mode
4. standard deviation