condition mean min max ZT0-3 46.3031050075 45.817440415 46.7887696 ZT4-7 31.237108212499997 30.230223685000002 32.243992739999996 ZT8-11 20.298686332499997 19.22562723 21.371745434999998 ZT12-15 17.812466827500003 16.725578515000002 18.89935514 ZT16-19 28.486794574999998 23.388833594999998 33.584755555 ZT20-23 54.47954539 50.670640844999994 58.288449935