condition mean min max ZT0-3 0.070637 0.0 0.10672000000000001 ZT4-7 0.051041 0.051041 0.051041 ZT8-11 0.0 0.0 0.0 ZT12-15 0.012929 0.0 0.025858 ZT16-19 0.0 0.0 0.0 ZT20-23 0.02825045 0.02825045 0.02825045