condition mean min max ZT0-3 30.680269 30.680269 30.680269 ZT4-7 113.518799 113.518799 113.518799 ZT8-11 82.11171 82.11171 82.11171 ZT12-15 94.639476 94.639476 94.639476 ZT16-19 40.165175500000004 40.165175500000004 40.165175500000004 ZT20-23 37.451734 37.451734 37.451734