condition mean min max ZT0-3 1.1677351435 0.6846328840000001 1.650837403 ZT4-7 1.13870761525 0.912527869 1.3648873615 ZT8-11 13.290842776 3.5759140895000003 23.0057714625 ZT12-15 29.0607762575 27.64100741 30.480545104999997 ZT16-19 18.903354937499998 15.610593325 22.19611655 ZT20-23 11.0606403045 10.9711068415 11.1501737675