condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.047512525 0.0 0.09502505 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0327036 0.0327036 0.0327036