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	Sum of Squares	Degrees of Freedom	Mean Square	F Stat
Between Treatments	14302	2	12160	3.82
Error (Within Treatments)	28019	12	3182.5
Total	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.