condition mean min max ZT0-3 1.0356045 0.9213370000000001 1.149872 ZT4-7 1.4383815 1.4383815 1.4383815 ZT8-11 1.4240949999999999 1.4240949999999999 1.4240949999999999 ZT12-15 0 0 0 ZT16-19 2.304965 2.304965 2.304965 ZT20-23 0.9120775 0.9120775 0.9120775