condition mean min max ZT0-3 122.25 122.25 122.25 ZT4-7 121.8 121.8 121.8 ZT8-11 205.45 205.45 205.45 ZT12-15 138.05 138.05 138.05 ZT16-19 74.95 74.95 74.95 ZT20-23 157.7 157.7 157.7