condition mean min max ZT0-3 35.44905 35.44905 35.44905 ZT4-7 21.9601 21.9601 21.9601 ZT8-11 25.63185 25.63185 25.63185 ZT12-15 41.627700000000004 41.627700000000004 41.627700000000004 ZT16-19 42.94695 42.94695 42.94695 ZT20-23 42.03735 42.03735 42.03735