condition mean min max ZT0-3 32.25 32.25 32.25 ZT4-7 71.9 71.9 71.9 ZT8-11 72.3 72.3 72.3 ZT12-15 63.0 63.0 63.0 ZT16-19 15.8 15.8 15.8 ZT20-23 73.5 73.5 73.5