condition mean min max ZT0-3 949.5999999999999 949.5999999999999 949.5999999999999 ZT4-7 1360.5 1360.5 1360.5 ZT8-11 1230.5 1230.5 1230.5 ZT12-15 1285.05 1285.05 1285.05 ZT16-19 1144.8000000000002 1144.8000000000002 1144.8000000000002 ZT20-23 1059.55 1059.55 1059.55