condition mean min max ZT0-3 0.4206861310000001 0.0 0.8413722620000001 ZT4-7 1.92763720175 1.7678603270000002 2.0874140765 ZT8-11 3.82103991025 2.1346901945 5.507389626 ZT12-15 6.2725137355000005 6.132352020000001 6.412675451 ZT16-19 5.513567934499999 5.455166669 5.5719692 ZT20-23 4.708854662499999 4.6044039004999995 4.813305424499999