condition mean min max ZT0-3 130.1204003375 42.888198375 217.3526023 ZT4-7 31.830811165 26.2486192 37.41300313 ZT8-11 50.338690345 42.929687805 57.747692885 ZT12-15 27.521681620000003 14.179941185 40.863422055 ZT16-19 15.400428867499999 13.23283091 17.568026824999997 ZT20-23 18.901363412500004 16.785283980000003 21.017442845