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: Source DF SS MS F P
Factor 3 2.45 0.82 2.93 0.040
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. Identify the null hypothesis and the alternate hypothesis.

Gexpressions: practice question 3 of 5 jackson wants to study the popularity of his music video by tracking the number of views the video gets on his website. the expression below represents the total number of views that jackson's video receives n days after he begins tracking the nu views, where b is the rate at which the number of views changes. alb)" select the statement that would accurately describe the effect of tripling a, the initial number of views before jackson beginst the rate at which the number of views changes, b, will triple. the total number of views the video has after n days, a(b)", will not change. the total number of days since jackson begins tracking views, n, will be reduced by one-third. the total number of views the video has after n days, alb)", will triple. submit