condition mean min max ZT0-3 5.5249372359999995 5.344170546 5.705703926 ZT4-7 1.4032588862500002 1.063115439 1.7434023335000002 ZT8-11 1.183350944 0.854933973 1.511767915 ZT12-15 1.715265374 1.5165213345000002 1.9140094134999999 ZT16-19 1.8325578007499999 1.5975773229999999 2.0675382785 ZT20-23 3.58984523575 3.2403732185 3.939317253