condition mean min max ZT0-3 61.05 61.05 61.05 ZT4-7 46.8 46.8 46.8 ZT8-11 77.44999999999999 77.44999999999999 77.44999999999999 ZT12-15 71.4 71.4 71.4 ZT16-19 72.45 72.45 72.45 ZT20-23 49.1 49.1 49.1