condition mean min max ZT0-3 0.03139995 0.0 0.047363800000000005 ZT4-7 0.0299076 0.0299076 0.0299076 ZT8-11 0.0 0.0 0.0 ZT12-15 0.00771185 0.0 0.0154237 ZT16-19 0.0 0.0 0.0 ZT20-23 0.01685075 0.01685075 0.01685075