condition mean min max ZT0-3 124.833525 81.04055 168.6265 ZT4-7 8.08789 8.08789 8.08789 ZT8-11 3.2043049999999997 3.2043049999999997 3.2043049999999997 ZT12-15 0 0 0 ZT16-19 13.36245 13.36245 13.36245 ZT20-23 14.9729 14.9729 14.9729