condition mean min max ZT0-3 3.6326150000000004 3.24415 4.02108 ZT4-7 29.33965 29.33965 29.33965 ZT8-11 78.774 78.774 78.774 ZT12-15 0 0 0 ZT16-19 36.3855 36.3855 36.3855 ZT20-23 23.70125 23.70125 23.70125