condition mean min max ZT0-3 15.4 15.4 15.4 ZT4-7 66.2 66.2 66.2 ZT8-11 55.05 55.05 55.05 ZT12-15 69.05 69.05 69.05 ZT16-19 52.8 52.8 52.8 ZT20-23 37.3 37.3 37.3