condition mean min max ZT0-3 14.296112716749999 7.6132958135 20.97892962 ZT4-7 9.46790861275 8.951770856 9.9840463695 ZT8-11 9.533986507 9.046530389499999 10.0214426245 ZT12-15 10.679531267249999 10.62304116 10.7360213745 ZT16-19 9.75990268875 9.5552394905 9.964565887 ZT20-23 8.949029907749999 8.494127836499999 9.403931979