condition mean min max ZT0-3 0.0115696245 0.0 0.023139249 ZT4-7 0.033197267499999995 0.0104537825 0.055940752499999996 ZT8-11 0.07761467450000001 0.072984641 0.082244708 ZT12-15 0.2621354445 0.25413875249999995 0.2701321365 ZT16-19 0.20597395824999998 0.16977433549999998 0.242173581 ZT20-23 0.08763278775000001 0.08445395800000001 0.09081161750000001