condition mean min max ZT0-3 0.0423935 0.0 0.084787 ZT4-7 0.16968450000000002 0.16968450000000002 0.16968450000000002 ZT8-11 0.04307725 0.04307725 0.04307725 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04167805 0.04167805 0.04167805