3. (15'). As production manager, you want to see if four filling machines have different mean filling times. You assign 48 similarly trained and experienced workers, 12 per machine, to the machines. (1) Complete (1 to 7 in the following ANOVA table. (2) At the 0.05 level of significance, is there a difference in mean filling times? ANOVA Table Source of Variable Sum of Squares Degrees of Freedom Mean Square F Treatment 1 3 230 Error 4866 Total 2 4. (10'). Given are five observations collected in a regression study on two variables. X 40 50 50 70 30 130 140 145 150 156 The estimated regression equation for these data is: D = a + 0.567x (1) Compute the intercept a. (2) Determine the value of ) when x is 60. (3) Interpret the regression equation