condition mean min max ZT0-3 0.22808314550000003 0.058521009000000006 0.39764528200000004 ZT4-7 9.85650032425 4.5495405635 15.163460085 ZT8-11 22.94342481 20.50262704 25.38422258 ZT12-15 37.438148345 35.30612715 39.570169539999995 ZT16-19 22.977170909999998 21.04141508 24.91292674 ZT20-23 30.7167068 29.715087869999998 31.718325730000004