condition mean min max ZT0-3 71.25 71.25 71.25 ZT4-7 71.7 71.7 71.7 ZT8-11 65.3 65.3 65.3 ZT12-15 68.45 68.45 68.45 ZT16-19 75.35 75.35 75.35 ZT20-23 57.449999999999996 57.449999999999996 57.449999999999996