condition mean min max ZT0-3 25.2 25.2 25.2 ZT4-7 62.9 62.9 62.9 ZT8-11 108.75 108.75 108.75 ZT12-15 46.05 46.05 46.05 ZT16-19 71.65 71.65 71.65 ZT20-23 49.85 49.85 49.85