condition mean min max ZT0-3 110.05000000000001 110.05000000000001 110.05000000000001 ZT4-7 87.6 87.6 87.6 ZT8-11 91.45 91.45 91.45 ZT12-15 78.95 78.95 78.95 ZT16-19 57.25 57.25 57.25 ZT20-23 98.55 98.55 98.55