condition mean min max ZT0-3 24.358800000000002 22.8275 25.8901 ZT4-7 36.672200000000004 36.672200000000004 36.672200000000004 ZT8-11 41.3146 41.3146 41.3146 ZT12-15 0 0 0 ZT16-19 41.1707 41.1707 41.1707 ZT20-23 31.34975 31.34975 31.34975