condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03849555 0.03849555 0.03849555 ZT8-11 0.0942975 0.0942975 0.0942975 ZT12-15 0.01279635 0.01279635 0.01279635 ZT16-19 0.0 0.0 0.0 ZT20-23 0.00560495 0.00560495 0.00560495