condition mean min max ZT0-3 614.85 614.85 614.85 ZT4-7 554.9 554.9 554.9 ZT8-11 543.9 543.9 543.9 ZT12-15 405.6 405.6 405.6 ZT16-19 566.75 566.75 566.75 ZT20-23 531.85 531.85 531.85