condition mean min max ZT0-3 356.5 356.5 356.5 ZT4-7 520.1 520.1 520.1 ZT8-11 539.05 539.05 539.05 ZT12-15 1418.1 1418.1 1418.1 ZT16-19 1241.95 1241.95 1241.95 ZT20-23 405.65 405.65 405.65