condition mean min max ZT0-3 73.65 73.65 73.65 ZT4-7 47.0 47.0 47.0 ZT8-11 28.25 28.25 28.25 ZT12-15 43.75 43.75 43.75 ZT16-19 78.15 78.15 78.15 ZT20-23 58.95 58.95 58.95