condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.04176735 0.04176735 0.04176735 ZT12-15 0.0486812 0.0486812 0.0486812 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0111717 0.0111717 0.0111717