condition mean min max ZT0-3 0.02119695 0.0 0.0423939 ZT4-7 0.0432543 0.0432543 0.0432543 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0