condition mean min max ZT0-3 333.006416 333.006416 333.006416 ZT4-7 178.884805 178.884805 178.884805 ZT8-11 130.1541985 130.1541985 130.1541985 ZT12-15 367.410778 367.410778 367.410778 ZT16-19 199.4636375 199.4636375 199.4636375 ZT20-23 477.14094750000004 477.14094750000004 477.14094750000004