condition mean min max ZT0-3 0.83962425 0.812932 0.8663164999999999 ZT4-7 1.173585 1.173585 1.173585 ZT8-11 0.672915 0.672915 0.672915 ZT12-15 0 0 0 ZT16-19 0.901432 0.901432 0.901432 ZT20-23 1.0083280000000001 1.0083280000000001 1.0083280000000001