condition mean min max ZT0-3 0.4153535 0.4153535 0.4153535 ZT4-7 0.12574275 0.12574275 0.12574275 ZT8-11 0.02277655 0.02277655 0.02277655 ZT12-15 0.01390865 0.01390865 0.01390865 ZT16-19 0.07346834999999999 0.07346834999999999 0.07346834999999999 ZT20-23 0.38262450000000003 0.38262450000000003 0.38262450000000003