condition mean min max ZT0-3 57.530005835 16.94466388 98.11534779 ZT4-7 183.2686911 163.81486575 202.72251645 ZT8-11 127.4874860125 101.433869875 153.54110215 ZT12-15 17.328269845 8.799904093 25.856635597 ZT16-19 14.709479981000001 10.505413522 18.91354644 ZT20-23 17.994323973 13.483186836 22.50546111