condition mean min max ZT0-3 0.074614 0.074614 0.074614 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.009884800000000001 0.009884800000000001 0.009884800000000001