4. In a completely randomized experimental design, 5 experimental units were used for each of the 3 levels of the factor (i.e., 3 treatments): (12 Points; 4 Points for each Part) Source of Variation Between Treatments Error (Within Treatments) Total Sum of Squares Degrees of Freedom Mean Square F Stat 14302 2 12160 3.82 28019 12 3182.5 42321 14 a. What is the null and alternative hypothesis for this ANOVA test? b. What is the rejection rule for the F test at the 0.05 level of significance? c. What is the conclusion of the F test? Please give a reason.