condition mean min max ZT0-3 2.5889974999999996 2.5878449999999997 2.59015 ZT4-7 0.7590600000000001 0.7590600000000001 0.7590600000000001 ZT8-11 0.379443 0.379443 0.379443 ZT12-15 0 0 0 ZT16-19 0.9153605 0.9153605 0.9153605 ZT20-23 1.0905865000000001 1.0905865000000001 1.0905865000000001