condition mean min max ZT0-3 0.10622525 0.069676 0.1427745 ZT4-7 0.140642 0.140642 0.140642 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.070837 0.070837 0.070837