condition mean min max ZT0-3 73.45 73.45 73.45 ZT4-7 117.9 117.9 117.9 ZT8-11 87.25 87.25 87.25 ZT12-15 136.05 136.05 136.05 ZT16-19 66.75 66.75 66.75 ZT20-23 75.05 75.05 75.05