condition mean min max ZT0-3 91.23265 90.04915 92.41615 ZT4-7 58.486799999999995 58.486799999999995 58.486799999999995 ZT8-11 163.5605 163.5605 163.5605 ZT12-15 0 0 0 ZT16-19 180.8555 180.8555 180.8555 ZT20-23 147.341 147.341 147.341