condition mean min max ZT0-3 102.6 102.6 102.6 ZT4-7 181.1 181.1 181.1 ZT8-11 126.75 126.75 126.75 ZT12-15 174.45 174.45 174.45 ZT16-19 115.0 115.0 115.0 ZT20-23 98.55 98.55 98.55