condition mean min max ZT0-3 24.552446316666664 0.061625849999999996 73.5179 ZT4-7 36.449799999999996 36.449799999999996 36.449799999999996 ZT8-11 23.2843 23.2843 23.2843 ZT12-15 22.399643249999997 0.3358365 44.463449999999995 ZT16-19 1.082085 1.082085 1.082085 ZT20-23 0.08831775 0.08831775 0.08831775