condition mean min max ZT0-3 1.11202675 1.033301 1.1907524999999999 ZT4-7 1.082658 1.082658 1.082658 ZT8-11 1.309225 1.309225 1.309225 ZT12-15 0 0 0 ZT16-19 2.33439 2.33439 2.33439 ZT20-23 1.65572 1.65572 1.65572