condition mean min max ZT0-3 501.1 501.1 501.1 ZT4-7 438.5 438.5 438.5 ZT8-11 402.75 402.75 402.75 ZT12-15 404.75 404.75 404.75 ZT16-19 498.7 498.7 498.7 ZT20-23 610.45 610.45 610.45