condition mean min max ZT0-3 0.009324025 0.0 0.01864805 ZT4-7 0.0194502 0.0194502 0.0194502 ZT8-11 0.01888555 0.01888555 0.01888555 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01895865 0.01895865 0.01895865