condition mean min max ZT0-3 79.21555 74.72399999999999 83.7071 ZT4-7 99.6937 99.6937 99.6937 ZT8-11 131.0475 131.0475 131.0475 ZT12-15 0 0 0 ZT16-19 162.6055 162.6055 162.6055 ZT20-23 98.50704999999999 98.50704999999999 98.50704999999999