Question: 4. 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

4. The postal service sorts mail as Priority Mail4. The postal service sorts mail as Priority Mail

4. 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, Iowa. The total delivery time in days was recorded. Minitab was used to perform the ANOVA. The results follow: DF 3 68 Source Factor Error Total F 3.07 MS 0.89 0.29 0.034 SS 2.67 19.43 22.10 8 00:52:21 71 Level Priority Mail Express Priority Mail First-Class Mail Standard Mail N 18 18 18 18 Mean 2.928 3.252 3.468 3.193 StDev 0.622 0.583 0.439 0.473 Using the ANOVA results, compare the average delivery times of the four different types of mail. b. What is the decision rule? Use the 0.01 significance level. (Round your answer to 2 decimal places.) 00:52-11 Reject Ho if F> c. Use the 0.01 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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