condition mean min max ZT0-3 0.0361990675 0.0 0.072398135 ZT4-7 0.038120495750000004 0.0 0.07624099150000001 ZT8-11 0.0 0.0 0.0 ZT12-15 0.027026399750000003 0.0 0.054052799500000005 ZT16-19 0.052012941 0.0 0.104025882 ZT20-23 0.0 0.0 0.0