condition mean min max ZT0-3 2.96448 2.25294 3.67602 ZT4-7 0.533543 0.533543 0.533543 ZT8-11 0.7033185 0.7033185 0.7033185 ZT12-15 0 0 0 ZT16-19 2.77956 2.77956 2.77956 ZT20-23 1.084705 1.084705 1.084705