QI (40 points) We collected a sample grade of midterm aud final exam. See data below midterm, Ti final, Yi yi ei 2.5 3.5 2.5 4.5 1.5 mean 10. (4 points)Calculate the simple coefficient of determination and the simple correlation coefficient based on the regression model. And use the simple correlation coefficient to interpret the relations between midterm grade and final grade. 11. (3 points) Apply a F-test to test HO : '31 = O, Ha : 431 O. Note F (1'4) = 4.5448.