condition mean min max ZT0-3 0.057385 0.0 0.172155 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.08352125 0.0 0.1670425 ZT16-19 0.1595145 0.1595145 0.1595145 ZT20-23 0.0 0.0 0.0