condition mean min max ZT0-3 1.2872833333333333 0.62175 2.57759 ZT4-7 0.0 0.0 0.0 ZT8-11 1.918035 1.918035 1.918035 ZT12-15 0.6389675 0.0 1.277935 ZT16-19 1.789575 1.789575 1.789575 ZT20-23 0.0 0.0 0.0