condition mean min max ZT0-3 1.16069075 1.1009115 1.22047 ZT4-7 2.61117 2.61117 2.61117 ZT8-11 1.8953950000000002 1.8953950000000002 1.8953950000000002 ZT12-15 0 0 0 ZT16-19 2.029085 2.029085 2.029085 ZT20-23 1.8682400000000001 1.8682400000000001 1.8682400000000001