condition mean min max ZT0-3 47.4 47.4 47.4 ZT4-7 41.8 41.8 41.8 ZT8-11 55.25 55.25 55.25 ZT12-15 70.65 70.65 70.65 ZT16-19 99.85 99.85 99.85 ZT20-23 80.7 80.7 80.7