condition mean min max ZT0-3 3.4569275 3.44067 3.473185 ZT4-7 2.906795 2.906795 2.906795 ZT8-11 2.59584 2.59584 2.59584 ZT12-15 0 0 0 ZT16-19 4.482595 4.482595 4.482595 ZT20-23 4.677709999999999 4.677709999999999 4.677709999999999