condition mean min max ZT0-3 10.00054357725 8.502043383 11.4990437715 ZT4-7 10.43377558625 8.3343738025 12.53317737 ZT8-11 18.304766989999997 12.307080899999999 24.30245308 ZT12-15 19.277242174999998 17.778281895 20.776202455 ZT16-19 22.5176128875 21.975640475 23.059585300000002 ZT20-23 23.757353464999998 23.357795019999998 24.156911909999998