condition mean min max ZT0-3 92.65 92.65 92.65 ZT4-7 61.6 61.6 61.6 ZT8-11 34.3 34.3 34.3 ZT12-15 79.45 79.45 79.45 ZT16-19 126.1 126.1 126.1 ZT20-23 183.8 183.8 183.8