condition mean min max ZT0-3 34.32856146 31.808240400000003 36.84888252 ZT4-7 29.311220234999997 22.205560735 36.416879734999995 ZT8-11 23.404373282499996 19.052077295 27.756669269999996 ZT12-15 5.27172022875 2.0838516065 8.459588851 ZT16-19 1.6790682399999999 1.633543627 1.7245928529999999 ZT20-23 0.9164517562500001 0.514137964 1.3187655485