condition mean min max ZT0-3 211.25 211.25 211.25 ZT4-7 311.9 311.9 311.9 ZT8-11 298.45 298.45 298.45 ZT12-15 292.70000000000005 292.70000000000005 292.70000000000005 ZT16-19 185.3 185.3 185.3 ZT20-23 259.04999999999995 259.04999999999995 259.04999999999995