condition mean min max ZT0-3 47.35 47.35 47.35 ZT4-7 65.2 65.2 65.2 ZT8-11 40.75 40.75 40.75 ZT12-15 66.05 66.05 66.05 ZT16-19 56.4 56.4 56.4 ZT20-23 65.3 65.3 65.3