condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0284299 0.0284299 0.0284299 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01492965 0.0 0.0298593 ZT16-19 0.02786035 0.02786035 0.02786035 ZT20-23 0.0640715 0.0640715 0.0640715