condition mean min max ZT0-3 287.5 287.5 287.5 ZT4-7 356.8 356.8 356.8 ZT8-11 396.75 396.75 396.75 ZT12-15 435.20000000000005 435.20000000000005 435.20000000000005 ZT16-19 350.4 350.4 350.4 ZT20-23 332.95 332.95 332.95