condition mean min max ZT0-3 133.988 133.988 133.988 ZT4-7 437.26 437.26 437.26 ZT8-11 7613.735000000001 7613.735000000001 7613.735000000001 ZT12-15 9665.205 9665.205 9665.205 ZT16-19 6508.805 6508.805 6508.805 ZT20-23 1003.52 1003.52 1003.52