condition mean min max ZT0-3 13.335645535000001 11.314314190000001 15.35697688 ZT4-7 16.5688497325 13.527462785 19.61023668 ZT8-11 23.098357802499997 21.09557054 25.101145064999997 ZT12-15 28.9300567125 26.523604435000003 31.33650899 ZT16-19 30.5653713325 26.926769014999998 34.20397365 ZT20-23 37.9476026675 35.52795134 40.367253995