condition mean min max ZT0-3 698.4 698.4 698.4 ZT4-7 493.0 493.0 493.0 ZT8-11 481.85 481.85 481.85 ZT12-15 636.2 636.2 636.2 ZT16-19 825.7 825.7 825.7 ZT20-23 701.3 701.3 701.3