condition mean min max ZT0-3 3.3242342325 3.316190532 3.332277933 ZT4-7 13.512741958500001 7.447798961999999 19.577684955000002 ZT8-11 146.39949632 61.41282708 231.38616556 ZT12-15 539.811501625 500.23449025 579.388513 ZT16-19 381.852638375 317.46153560000005 446.24374115 ZT20-23 177.067970925 148.12661780000002 206.00932404999998