condition mean min max ZT0-3 0.04691641666666667 0.0 0.100778 ZT4-7 0.0570715 0.0570715 0.0570715 ZT8-11 0.11572095000000002 0.11572095000000002 0.11572095000000002 ZT12-15 0.37280925000000004 0.16261150000000002 0.583007 ZT16-19 0.0186757 0.0186757 0.0186757 ZT20-23 0.0 0.0 0.0