condition mean min max ZT0-3 645.793791 645.793791 645.793791 ZT4-7 829.1042554999999 829.1042554999999 829.1042554999999 ZT8-11 800.1738405 800.1738405 800.1738405 ZT12-15 746.5675630000001 746.5675630000001 746.5675630000001 ZT16-19 679.0193565 679.0193565 679.0193565 ZT20-23 479.9141175 479.9141175 479.9141175