condition mean min max ZT0-3 11.031109310166666 3.1624779305 18.98545 ZT4-7 44.57655 44.57655 44.57655 ZT8-11 21.1811 21.1811 21.1811 ZT12-15 2.996940719015 2.176780473 3.81710096503 ZT16-19 9.7441 9.7441 9.7441 ZT20-23 3.535025 3.535025 3.535025