condition mean min max ZT0-3 41.841049999999996 41.841049999999996 41.841049999999996 ZT4-7 58.6736 58.6736 58.6736 ZT8-11 57.6167 57.6167 57.6167 ZT12-15 41.809799999999996 41.809799999999996 41.809799999999996 ZT16-19 31.19825 31.19825 31.19825 ZT20-23 33.54785 33.54785 33.54785