condition mean min max ZT0-3 74.55 74.55 74.55 ZT4-7 87.6 87.6 87.6 ZT8-11 96.0 96.0 96.0 ZT12-15 100.05 100.05 100.05 ZT16-19 95.85 95.85 95.85 ZT20-23 81.75 81.75 81.75