condition mean min max ZT0-3 22.919700000000002 15.90755 26.518250000000002 ZT4-7 10.71555 10.71555 10.71555 ZT8-11 10.011745000000001 10.011745000000001 10.011745000000001 ZT12-15 14.425999999999998 13.925899999999999 14.9261 ZT16-19 17.535400000000003 17.535400000000003 17.535400000000003 ZT20-23 25.7866 25.7866 25.7866