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Question: the postal service sorts mail as priority mail express priority...

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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 Factor Error Total DF 68 71 MS 2.41 0.80 2.50 0.067 21.58 0.32 23.99 Level Priority Mail Express Priority Mail First-class Mail Standard Mail N Mean StDev 18 2.833 0.530 18 3.350 0.788 18 3.099 0.450 18 3.0790.406 Using the ANOVA results, compare the average delivery times of the four different types of mail 1. Identify the null hypothesis and the alternate hypothesis Null hypothesis2. Alternate hypothesis: O Hi: At least one mean is different. OHy: All means are equal. 3. What is the decision rule? Use the 0.05 significance level. (Round your answer to 2 decimal places) Reject HO if F> 4.08 4. Use the 0.05 significance level to test if this evidence suggests a difference in the means for the different types of mail HO is There is in the means for the different types of mail.

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