condition mean min max ZT0-3 1.3717578965 0.9687391909999999 1.774776602 ZT4-7 1.13555948625 1.0640749385000001 1.207044034 ZT8-11 2.599117712 1.367417138 3.8308182860000004 ZT12-15 4.351411823499999 3.937368843 4.765454804 ZT16-19 2.745905243 2.595716747 2.896093739 ZT20-23 2.9072852730000003 2.8809943015 2.9335762445