condition mean min max ZT0-3 555.4 555.4 555.4 ZT4-7 635.3 635.3 635.3 ZT8-11 576.8 576.8 576.8 ZT12-15 535.35 535.35 535.35 ZT16-19 642.3 642.3 642.3 ZT20-23 629.75 629.75 629.75