condition mean min max ZT0-3 0.049067049249999994 0.031624598 0.0665095005 ZT4-7 0.17746542925 0.093223045 0.2617078135 ZT8-11 1.5526853910000002 0.8851519320000001 2.22021885 ZT12-15 4.61659280825 2.917439539 6.3157460775 ZT16-19 3.30829839725 2.8918698970000003 3.7247268975 ZT20-23 6.781590325000001 5.808600093500001 7.7545805565000006