condition mean min max ZT0-3 1.5445425 1.02816 2.060925 ZT4-7 0.0 0.0 0.0 ZT8-11 1.048015 1.048015 1.048015 ZT12-15 0 0 0 ZT16-19 1.011145 1.011145 1.011145 ZT20-23 1.013975 1.013975 1.013975