condition mean min max ZT0-3 15949.1 15949.1 15949.1 ZT4-7 16017.8 16017.8 16017.8 ZT8-11 16823.75 16823.75 16823.75 ZT12-15 14966.35 14966.35 14966.35 ZT16-19 15853.2 15853.2 15853.2 ZT20-23 16431.5 16431.5 16431.5