condition mean min max ZT0-3 55.991279004999996 31.009836139999997 80.97272187 ZT4-7 30.213383935 30.058556744999997 30.368211125000002 ZT8-11 32.144505609999996 28.807924890000002 35.48108633 ZT12-15 38.850402865 38.668351685000005 39.032454044999994 ZT16-19 54.607892375000006 44.601870915 64.613913835 ZT20-23 124.2431110375 94.317175475 154.1690466