condition mean min max ZT0-3 555.4436486249999 544.6162130499999 566.2710842 ZT4-7 176.52864975 160.28894119999998 192.7683583 ZT8-11 319.3537454 212.34315435000002 426.36433645 ZT12-15 248.3857521575 148.553348065 348.21815625 ZT16-19 98.3708789325 86.16350613 110.57825173500001 ZT20-23 73.7734989125 67.98407105000001 79.562926775