condition mean min max ZT0-3 0.1855263 0.1028659 0.333716 ZT4-7 0.04919765 0.04919765 0.04919765 ZT8-11 0.02760975 0.02760975 0.02760975 ZT12-15 0.02752375 0.0 0.0550475 ZT16-19 0.051391 0.051391 0.051391 ZT20-23 0.0525195 0.0525195 0.0525195