condition mean min max ZT0-3 84.693858 84.693858 84.693858 ZT4-7 153.9754895 153.9754895 153.9754895 ZT8-11 103.638278 103.638278 103.638278 ZT12-15 105.385142 105.385142 105.385142 ZT16-19 47.308654000000004 47.308654000000004 47.308654000000004 ZT20-23 32.545009 32.545009 32.545009