condition mean min max ZT0-3 3.2724849999999996 3.2724849999999996 3.2724849999999996 ZT4-7 1.349315 1.349315 1.349315 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 2.35086 2.35086 2.35086 ZT20-23 2.91377 2.91377 2.91377