condition mean min max ZT0-3 0.017909666666666667 0.0 0.053729 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0515435 0.0515435 0.0515435 ZT12-15 0.0142428 0.0 0.0284856 ZT16-19 0.0479697 0.0479697 0.0479697 ZT20-23 0.0 0.0 0.0