condition mean min max ZT0-3 0.1850945 0.0 0.4645215 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.162127 0.1026545 0.2215995 ZT16-19 0.1211535 0.1211535 0.1211535 ZT20-23 0.3282045 0.3282045 0.3282045