condition mean min max ZT0-3 581.35 581.35 581.35 ZT4-7 562.1 562.1 562.1 ZT8-11 550.55 550.55 550.55 ZT12-15 445.45 445.45 445.45 ZT16-19 507.85 507.85 507.85 ZT20-23 466.55 466.55 466.55