condition mean min max ZT0-3 0.14378485000000002 0.14378485000000002 0.14378485000000002 ZT4-7 0.143757 0.143757 0.143757 ZT8-11 0.34340950000000003 0.34340950000000003 0.34340950000000003 ZT12-15 0.29469860000000003 0.29469860000000003 0.29469860000000003 ZT16-19 0.45079099999999994 0.45079099999999994 0.45079099999999994 ZT20-23 0.3114 0.3114 0.3114