condition mean min max ZT0-3 87.1 87.1 87.1 ZT4-7 63.4 63.4 63.4 ZT8-11 86.0 86.0 86.0 ZT12-15 92.4 92.4 92.4 ZT16-19 70.35 70.35 70.35 ZT20-23 74.85 74.85 74.85