condition mean min max ZT0-3 64.35 64.35 64.35 ZT4-7 7.3 7.3 7.3 ZT8-11 18.1 18.1 18.1 ZT12-15 24.65 24.65 24.65 ZT16-19 78.25 78.25 78.25 ZT20-23 47.8 47.8 47.8