condition mean min max ZT0-3 15.6375846845 9.510999568999999 21.7641698 ZT4-7 37.5598513925 27.949925835000002 47.16977695 ZT8-11 40.9242204425 40.854124135 40.994316749999996 ZT12-15 36.0263912075 35.474741015 36.578041400000004 ZT16-19 41.27290901 37.519437865 45.026380155 ZT20-23 49.90154702 49.65845276 50.14464128