president age Washington 57 John Adams 61 Jefferson 57 Madison 57 Monroe 58 J. Q. Adams 57 Jackson 61 Van Buren 54 W. H. Harrison 68 Tyler 51 Polk 49 Taylor 64 Fillmore 50 Pierce 48 Buchanan 65 Lincoln 52 Compute each of the following summary statistics. Round your answers to the nearest 0.1 years. median = years IQR = years mean = years standard deviation = years