condition mean min max ZT0-3 0.119865 0.0 0.241818 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.56234975 0.3548685 0.769831 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0