STAT TECH IN BUSINESS & ECON AC
18th Edition
ISBN: 9781264731657
Author: Lind
Publisher: MCG
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Chapter 12, Problem 37CE
To determine
Compare the average delivery times of the four different types of mail.
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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, Iowa. The total delivery time in d
was recorded. Minitab was used to perform the ANOVA. The results follow
Source
Factor
Error
Total
DE
3
68
71
55
MS
2.82 0.94 3.48 0.021
18.44 0.27
21.26
Level
Priority Mail Express
Priority Mail
First-Class Mail
Standard Mail
N Mean StDev
18 2.880
0.402
18 2.838
0.653
18
18
3.084
3.337
0.549
0.442
Using the ANOVA results, compare the average delivery times of the four different types of mail.
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
2.41
0.80
2.50
0.067
Error
68
21.58
0.32
Total
71
23.99
Level
N
Mean
StDev
Priority Mail Express
18
2.833
0.530
Priority Mail
18
3.350
0.788
First-Class Mail
18
3.099
0.450
Standard Mail
18
3.079
0.406
Using the ANOVA results, compare the average delivery times of the four different types of mail.a. Identify the null hypothesis and the alternate hypothesis.Null hypothesis:
H0: μ1 ≠ μ2 ≠ μ3 ≠ μ4
H0: μ1 = μ2 = μ3 = μ4
multiple choice 1
a
b
Alternate hypothesis:multiple choice 2
H1: At least one mean is different.
H1: All means are equal.
b.…
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
b. What is the decision rule? Use the 0.05 significance level. (Round your answer to 2 decimal places.)
Reject Ho if F> _________
Chapter 12 Solutions
STAT TECH IN BUSINESS & ECON AC
Ch. 12 - Steele Electric Products Inc. assembles cell...Ch. 12 - What is the critical F value when the sample size...Ch. 12 - Prob. 2ECh. 12 - Prob. 3ECh. 12 - Prob. 4ECh. 12 - Prob. 5ECh. 12 - Prob. 6ECh. 12 - Prob. 2SRCh. 12 - Prob. 7ECh. 12 - Prob. 8E
Ch. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - Prob. 3SRCh. 12 - Prob. 11ECh. 12 - The following are six observations collected from...Ch. 12 - Prob. 13ECh. 12 - Prob. 14ECh. 12 - Prob. 4SRCh. 12 - Prob. 15ECh. 12 - For exercises 15 and 16, conduct a test of...Ch. 12 - Prob. 17ECh. 12 - Prob. 18ECh. 12 - Prob. 5SRCh. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - Prob. 23CECh. 12 - Prob. 24CECh. 12 - Prob. 25CECh. 12 - Prob. 26CECh. 12 - In an ANOVA table, the MSE is equal to 10. Random...Ch. 12 - Prob. 28CECh. 12 - Prob. 29CECh. 12 - Prob. 30CECh. 12 - Prob. 31CECh. 12 - Prob. 32CECh. 12 - Prob. 33CECh. 12 - Prob. 34CECh. 12 - Prob. 35CECh. 12 - Prob. 36CECh. 12 - Prob. 37CECh. 12 - Prob. 38CECh. 12 - Prob. 39CECh. 12 - Prob. 40CECh. 12 - Prob. 41CECh. 12 - Prob. 42CECh. 12 - Prob. 43CECh. 12 - Prob. 44CECh. 12 - Prob. 45CECh. 12 - Prob. 46CECh. 12 - Prob. 47CECh. 12 - Prob. 48CECh. 12 - Prob. 50DACh. 12 - Prob. 51DACh. 12 - Prob. 1PCh. 12 - Prob. 2PCh. 12 - Prob. 3PCh. 12 - Prob. 4PCh. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 1CCh. 12 - Prob. 2CCh. 12 - Prob. 1.1PTCh. 12 - The likelihood of rejecting a true null hypothesis...Ch. 12 - Prob. 1.3PTCh. 12 - Prob. 1.4PTCh. 12 - Prob. 1.5PTCh. 12 - Prob. 1.6PTCh. 12 - In a two-tailed test, the rejection region is...Ch. 12 - Prob. 1.8PTCh. 12 - Prob. 1.9PTCh. 12 - Prob. 1.10PTCh. 12 - Prob. 2.1PTCh. 12 - Prob. 2.2PTCh. 12 - Prob. 2.3PT
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