condition mean min max ZT0-3 1.048307 1.048307 1.048307 ZT4-7 0.82835 0.82835 0.82835 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03768225 0.03768225 0.03768225 ZT16-19 0.10003895 0.10003895 0.10003895 ZT20-23 0.434852 0.434852 0.434852