condition mean min max ZT0-3 0.031548483333333335 0.0293443 0.03375266666666667 ZT4-7 0.0222976 0.0222976 0.0222976 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0109589 0.0 0.0219178 ZT20-23 0 0 0