condition mean min max ZT0-3 14.4994 14.4994 14.4994 ZT4-7 9.92387 9.92387 9.92387 ZT8-11 15.762149999999998 15.762149999999998 15.762149999999998 ZT12-15 19.863 19.863 19.863 ZT16-19 27.9926 27.9926 27.9926 ZT20-23 24.28845 24.28845 24.28845