condition mean min max ZT0-3 487.9 487.9 487.9 ZT4-7 396.6 396.6 396.6 ZT8-11 385.75 385.75 385.75 ZT12-15 417.4 417.4 417.4 ZT16-19 339.95 339.95 339.95 ZT20-23 457.65 457.65 457.65