condition mean min max ZT0-3 174.30898 174.30898 174.30898 ZT4-7 117.389524 117.389524 117.389524 ZT8-11 128.8194485 128.8194485 128.8194485 ZT12-15 118.2465755 118.2465755 118.2465755 ZT16-19 87.21412950000001 87.21412950000001 87.21412950000001 ZT20-23 92.0522445 92.0522445 92.0522445