condition mean min max ZT0-3 178.77 168.3105 199.293 ZT4-7 174.69549999999998 174.69549999999998 174.69549999999998 ZT8-11 209.0525 209.0525 209.0525 ZT12-15 211.711 203.579 219.84300000000002 ZT16-19 238.293 238.293 238.293 ZT20-23 213.63850000000002 213.63850000000002 213.63850000000002