condition mean min max ZT0-3 62.480949 62.480949 62.480949 ZT4-7 46.890611 46.890611 46.890611 ZT8-11 46.045002999999994 46.045002999999994 46.045002999999994 ZT12-15 58.372636 58.372636 58.372636 ZT16-19 64.165884 64.165884 64.165884 ZT20-23 74.54854399999999 74.54854399999999 74.54854399999999