condition mean min max ZT0-3 47.05 47.05 47.05 ZT4-7 29.8 29.8 29.8 ZT8-11 27.549999999999997 27.549999999999997 27.549999999999997 ZT12-15 59.05 59.05 59.05 ZT16-19 30.85 30.85 30.85 ZT20-23 49.95 49.95 49.95