condition mean min max ZT0-3 117.35 117.35 117.35 ZT4-7 74.6 74.6 74.6 ZT8-11 64.05 64.05 64.05 ZT12-15 89.5 89.5 89.5 ZT16-19 174.1 174.1 174.1 ZT20-23 121.2 121.2 121.2