condition mean min max ZT0-3 13.147256926499999 8.133777217999999 18.160736635 ZT4-7 18.2441775625 17.05277296 19.435582165 ZT8-11 12.32025240525 10.5227893245 14.117715486000002 ZT12-15 3.17820400325 2.7199972005 3.6364108059999998 ZT16-19 3.955368074 3.7123684425 4.1983677055 ZT20-23 3.22789886375 2.243623057 4.2121746705