condition mean min max ZT0-3 356.05 356.05 356.05 ZT4-7 310.5 310.5 310.5 ZT8-11 418.75 418.75 418.75 ZT12-15 433.0 433.0 433.0 ZT16-19 507.35 507.35 507.35 ZT20-23 490.25 490.25 490.25