condition mean min max ZT0-3 0.6470735097500001 0.16078499599999999 1.1333620235000001 ZT4-7 1.6561510975 1.5257092380000001 1.786592957 ZT8-11 2.68001143425 1.983598877 3.3764239915000003 ZT12-15 3.1371532332500003 2.7019602525 3.5723462140000004 ZT16-19 2.4583702777500003 2.3601061765 2.556634379 ZT20-23 1.68077528175 1.2708359085 2.0907146549999998