condition mean min max ZT0-3 4.54962 3.029495 6.069745 ZT4-7 4.204555 4.204555 4.204555 ZT8-11 1.8090350000000002 1.8090350000000002 1.8090350000000002 ZT12-15 0 0 0 ZT16-19 1.95187 1.95187 1.95187 ZT20-23 3.196965 3.196965 3.196965