condition mean min max ZT0-3 0.0370085 0.0 0.1110255 ZT4-7 0.0 0.0 0.0 ZT8-11 0.1146595 0.1146595 0.1146595 ZT12-15 0.05575425 0.0 0.1115085 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0