condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.1153235 0.1153235 0.1153235 ZT8-11 2.42605 2.42605 2.42605 ZT12-15 0.163232 0.163232 0.163232 ZT16-19 0.641925 0.641925 0.641925 ZT20-23 0.0 0.0 0.0