condition mean min max ZT0-3 72.63308333333333 38.37985 96.91565 ZT4-7 149.405 149.405 149.405 ZT8-11 106.4513 106.4513 106.4513 ZT12-15 88.9911 73.76075 104.22145 ZT16-19 76.14815 76.14815 76.14815 ZT20-23 45.8511 45.8511 45.8511