condition mean min max ZT0-3 184.65516666666667 141.0865 261.2215 ZT4-7 143.4555 143.4555 143.4555 ZT8-11 33.2179 33.2179 33.2179 ZT12-15 67.645875 54.78475 80.507 ZT16-19 29.8662 29.8662 29.8662 ZT20-23 69.0299 69.0299 69.0299