STATISTICAL TECH IN BUSN CONNECT <LCPO>
18th Edition
ISBN: 9781266505942
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.
Stacy conducts a study to look at the effects of season (fall, winter, spring, summer) and type of cat (long hair or short hair) on how much a cat sheds. What is the two-way ANOVA design for this study?
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.…
Chapter 12 Solutions
STATISTICAL TECH IN BUSN CONNECT <LCPO>
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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- What is a sample space?arrow_forwardAn apple orchard's workers pick 12,500 apples in the month of October. A sample of 300 of these apples shows that 15 of them are damaged and bruised. What is the best estimate of the percent of apples picked at the orchard in October that are bruised and damaged?arrow_forwardA Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run results in 23 defective assemblies out of 500. Does this data suggest that the true percentage of defectives is less than 5%? Use NATDRC.arrow_forward
- 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> _________arrow_forwardThe 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 2.91 0.97 3.73 0.015 Error 68 17.36 0.26 Total 71 20.27 Level N Mean StDev Priority Mail Express 18 2.917 0.427 Priority Mail 18 2.941 0.741 First-Class Mail 18 3.402 0.440 Standard Mail 18 3.215 0.311 Using the ANOVA results, compare the average delivery times of the four different types of mail. Identify the null hypothesis and the alternate hypothesis. Null hypothesis: H0: μ1 ≠ μ2 ≠ μ3 ≠ μ4 H0: μ1 = μ2 = μ3 = μ4 a b Alternate hypothesis: H1: At least one mean is different. H1: All means are equal.…arrow_forwardDescribe why a researcher would use ANOVA. and Design a research idea that would require ANOVA to compute the dataarrow_forward
- Hurricane Andrew swept through southern Florida causing billions of dollars of damage. Because of the severity of the storm and the type of residential construction used in this semitropical area, there was some concern that the average claim size would be greater than the historical average hurricane claim of $23,000$23,000. Several insurance companies collaborated in a data gathering experiment. They randomly selected 2222 homes and sent adjusters to settle the claims. In the sample of 2222 homes, the average claim was $24,500$24,500 with a population standard deviation of $4100$4100. Is there sufficient evidence at a 0.010.01 significance level to support the claim that the home damage is greater than the historical average? Assume the population of insurance claims is approximately normally distributed. Compute the value of the test statistic. Round your answer to two decimal places.arrow_forwardExplain the Flow chart for one-factor ANOVA.arrow_forwardA large department store examined a sample of the 21 credit card sales and recorded the amounts charged for each of three types of credit cards: MasterCard, Visa, and Discover. Six MasterCard sales, seven Visa, and eight Discover sales were recorded. The store used an ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?arrow_forward
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