condition mean min max ZT0-3 57.558684506666665 56.249511053333336 58.867857959999995 ZT4-7 62.242295479999996 61.905944489999996 62.57864647 ZT8-11 65.91685452833333 63.39406202666667 68.43964703 ZT12-15 63.72440105 61.026180063333335 66.42262203666667 ZT16-19 60.77843908333333 58.25791932 63.298958846666665 ZT20-23 55.922509585 50.9046648 60.94035437