condition mean min max ZT0-3 0.008553483333333334 0.0 0.02566045 ZT4-7 0.05113525 0.05113525 0.05113525 ZT8-11 0.0264534 0.0264534 0.0264534 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.055568 0.055568 0.055568