condition mean min max ZT0-3 1.0033065 0.885166 1.121447 ZT4-7 1.7461 1.7461 1.7461 ZT8-11 3.745135 3.745135 3.745135 ZT12-15 0 0 0 ZT16-19 2.55577 2.55577 2.55577 ZT20-23 1.6101450000000002 1.6101450000000002 1.6101450000000002