condition mean min max ZT0-3 121.25 121.25 121.25 ZT4-7 125.5 125.5 125.5 ZT8-11 67.85 67.85 67.85 ZT12-15 11.35 11.35 11.35 ZT16-19 129.9 129.9 129.9 ZT20-23 140.25 140.25 140.25