condition mean min max ZT0-3 0.100356 0.0 0.301068 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.2997775 0.2997775 0.2997775 ZT20-23 0.0 0.0 0.0