condition mean min max ZT0-3 146.470404765 118.05067883000001 174.8901307 ZT4-7 83.71564569499999 72.15178293 95.27950845999999 ZT8-11 88.34876548 88.058731915 88.638799045 ZT12-15 16.8357900615 1.538948889 32.132631234 ZT16-19 0.70742796675 0.6971287115 0.7177272219999999 ZT20-23 0.4995061535 0.44844848700000006 0.5505638199999999