condition mean min max ZT0-3 943.0 943.0 943.0 ZT4-7 1213.6 1213.6 1213.6 ZT8-11 841.2 841.2 841.2 ZT12-15 735.8 735.8 735.8 ZT16-19 880.5 880.5 880.5 ZT20-23 867.65 867.65 867.65