condition mean min max ZT0-3 871.75 871.75 871.75 ZT4-7 1028.5 1028.5 1028.5 ZT8-11 1112.25 1112.25 1112.25 ZT12-15 1108.95 1108.95 1108.95 ZT16-19 972.8000000000001 972.8000000000001 972.8000000000001 ZT20-23 813.55 813.55 813.55