condition mean min max ZT0-3 49.766725 46.6481 52.88535 ZT4-7 55.6935 55.6935 55.6935 ZT8-11 68.68795 68.68795 68.68795 ZT12-15 0 0 0 ZT16-19 90.0607 90.0607 90.0607 ZT20-23 60.0638 60.0638 60.0638