condition mean min max ZT0-3 58.11094166666667 36.04833333333333 80.17355 ZT4-7 35.785 35.785 35.785 ZT8-11 31.2691 31.2691 31.2691 ZT12-15 56.05215 47.9804 64.12389999999999 ZT16-19 85.40944999999999 81.7255 89.0934 ZT20-23 0 0 0