condition mean min max ZT0-3 0.21019 0.0 0.63057 ZT4-7 0.0 0.0 0.0 ZT8-11 0.577835 0.577835 0.577835 ZT12-15 1.28223 0.0 2.56446 ZT16-19 0.0 0.0 0.0 ZT20-23 0.631725 0.631725 0.631725