condition mean min max ZT0-3 147.626932625 133.8198561 161.43400915 ZT4-7 130.896699675 124.77762715 137.01577220000001 ZT8-11 238.7251426 172.94097795 304.50930725 ZT12-15 276.538737925 229.84093105 323.23654480000005 ZT16-19 169.83424915 126.70737795 212.96112035000002 ZT20-23 70.563917425 60.69977041999999 80.42806443