condition mean min max ZT0-3 121.94999999999999 121.94999999999999 121.94999999999999 ZT4-7 69.2 69.2 69.2 ZT8-11 132.05 132.05 132.05 ZT12-15 147.5 147.5 147.5 ZT16-19 81.7 81.7 81.7 ZT20-23 124.4 124.4 124.4