condition mean min max ZT0-3 879.8499999999999 879.8499999999999 879.8499999999999 ZT4-7 857.8 857.8 857.8 ZT8-11 1147.2 1147.2 1147.2 ZT12-15 1098.9 1098.9 1098.9 ZT16-19 770.5 770.5 770.5 ZT20-23 694.35 694.35 694.35