condition mean min max ZT0-3 1361.85 1361.85 1361.85 ZT4-7 1066.5 1066.5 1066.5 ZT8-11 793.05 793.05 793.05 ZT12-15 861.5 861.5 861.5 ZT16-19 1246.8000000000002 1246.8000000000002 1246.8000000000002 ZT20-23 1405.35 1405.35 1405.35