condition mean min max ZT0-3 0.0378632 0.0275425 0.0564495 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.015387225 0.0 0.03077445 ZT16-19 0.079275 0.079275 0.079275 ZT20-23 0.030924 0.030924 0.030924