The postal service sorts mail as Priority Mail Express, Priority Mail, First-Class Mail, or Standard Mail. Over a period of 3 weeks, 18 of each type were mailed from the Network Distribution Center in Atlanta, Georgia, to Des Moines, lowa. The total delivery time in days was recorded. Minitab was used to perform the ANOVA. The results follow: Source DF 55 MS F P Factor 2.45 0.82 2.93 6.040 Error 68 19 . 11 0. 28 Total 71 21.56 Level N Mean StDev Priority Mail Express 18 2.959 0. 397 Priority Mail 18 3.466 0. 714 First-Class Mail 18 3.163 0. 606 Standard Mail 18 3.106 0. 300 Using the ANOVA results, compare the average delivery times of the four different types of mail. Required: a. Identify the null hypothesis and the alternate hypothesis. Null hypothesis: a. He H1 # H2 # M3 # HA b. He H1 = M2 = M3 = H4 O a Ob Alternate hypothesis: O H1: At least one mean is different. O H1: All means are equal.b. What is the decision rule? Use the 0.05 significance level. [Round your answer to 2 decimal places.) _:| 1:. Use the 0.05 significance level to test if this evidence suggests a difference in the means for the different types of mail