condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.06545 0.06545 0.06545 ZT12-15 0.10395525 0.0 0.2079105 ZT16-19 0.061144 0.061144 0.061144 ZT20-23 0.0 0.0 0.0