condition mean min max ZT0-3 952.6 952.6 952.6 ZT4-7 519.7 519.7 519.7 ZT8-11 559.5 559.5 559.5 ZT12-15 848.45 848.45 848.45 ZT16-19 1035.75 1035.75 1035.75 ZT20-23 1126.4 1126.4 1126.4