condition mean min max ZT0-3 35.978049999999996 19.94115 44.927099999999996 ZT4-7 17.0029 17.0029 17.0029 ZT8-11 12.4686 12.4686 12.4686 ZT12-15 15.8722 15.20875 16.53565 ZT16-19 20.2941 20.2941 20.2941 ZT20-23 41.612449999999995 41.612449999999995 41.612449999999995