condition mean min max ZT0-3 0.039845 0.0 0.07969 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0403525 0.0403525 0.0403525 ZT12-15 0 0 0 ZT16-19 0.120649 0.120649 0.120649 ZT20-23 0.04050865 0.04050865 0.04050865