condition mean min max ZT0-3 98.238789 98.238789 98.238789 ZT4-7 86.7397875 86.7397875 86.7397875 ZT8-11 84.14903699999999 84.14903699999999 84.14903699999999 ZT12-15 89.3678 89.3678 89.3678 ZT16-19 121.9703835 121.9703835 121.9703835 ZT20-23 130.9912205 130.9912205 130.9912205