condition mean min max ZT0-3 151.3 151.3 151.3 ZT4-7 71.7 71.7 71.7 ZT8-11 82.7 82.7 82.7 ZT12-15 73.55 73.55 73.55 ZT16-19 144.2 144.2 144.2 ZT20-23 226.65 226.65 226.65