condition mean min max ZT0-3 398.75 398.75 398.75 ZT4-7 501.9 501.9 501.9 ZT8-11 470.65 470.65 470.65 ZT12-15 572.9 572.9 572.9 ZT16-19 529.85 529.85 529.85 ZT20-23 458.3 458.3 458.3