condition mean min max ZT0-3 6.905678333333333 4.30562 9.4349 ZT4-7 17.290785 17.290785 17.290785 ZT8-11 4.08244 4.08244 4.08244 ZT12-15 1.574447347875 9.69575e-06 3.148885 ZT16-19 3.254205 3.254205 3.254205 ZT20-23 6.840714999999999 6.840714999999999 6.840714999999999