condition mean min max ZT0-3 413.55851232500004 343.38686255 483.73016210000003 ZT4-7 223.547526875 190.06770775 257.02734599999997 ZT8-11 89.13136736499999 66.5709744 111.69176032999998 ZT12-15 67.26732570249999 63.52813549 71.006515915 ZT16-19 96.21375750749999 95.92756761999999 96.49994739499999 ZT20-23 68.30663595499999 59.583863584999996 77.02940832499999