condition mean min max ZT0-3 906.6 906.6 906.6 ZT4-7 1121.2 1121.2 1121.2 ZT8-11 1042.85 1042.85 1042.85 ZT12-15 1086.35 1086.35 1086.35 ZT16-19 962.7 962.7 962.7 ZT20-23 910.6500000000001 910.6500000000001 910.6500000000001