condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.060515872 0.038082011666666665 0.08294973233333333 ZT8-11 0.066320406 0.0 0.132640812 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0