condition mean min max ZT0-3 0.037925 0.0 0.07585 ZT4-7 0.231443 0.231443 0.231443 ZT8-11 0.151981 0.151981 0.151981 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0