condition mean min max ZT0-3 0.716617 0.2505125 1.36174 ZT4-7 2.0021750000000003 2.0021750000000003 2.0021750000000003 ZT8-11 1.29312 1.29312 1.29312 ZT12-15 0.1440765 0.0 0.288153 ZT16-19 0.259336 0.259336 0.259336 ZT20-23 0.0 0.0 0.0