condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.08241735 0.08241735 0.08241735 ZT8-11 0.092445 0.092445 0.092445 ZT12-15 0.02553975 0.02553975 0.02553975 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0