CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
13th Edition
ISBN: 9781337094399
Author: Cochran
Publisher: IACCENGAGE
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Textbook Question
Chapter 13.3, Problem 19E
Refer to exercise 18. Use the Bonferroni adjustment to test for a significant difference between all pairs of means. Assume that a maximum overall experimentwise error rate of .05 is desired.
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Rangecient of Variaice: 45.31N
6.- The day after Thanksgiving-called Black Friday–is one of the largest shopping days in the United
States. A group of researchers conducted interviews with a sample of 38 women shopping on Black
Friday to gauge their shopping habits and reported the results in a published paper, in 2011. One
question was, "“How many hours do you usually spend shopping on Black Friday?" Data for the 38
shoppers are listed here: 66443 16 4 4 5 6 6 5 5 4 6 5 6 4 5 4 44 7 12 5 86 10 5 8 8 3 38 5 6 10 11.
Descriptive statistics for these data are in this table:
AExplore Data - Descriptive Statistics
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Summary statistics:
Explore Data - Column 4
Variance Std. dev. Std. err.
. Median Range Min Max Q1 Q3
Column n
Mean
Sample Size, ni
38
6.078947
38 6 0789474 7 5881935 2.7546676 044686609
13
3
16 4 7
var4
Meani
Nedi an:
Midrange:
9.5
6.658987
7.588193
Standard Deviation, s I 2.754668
Mean Absolute Deviation 1.958449
Variance,…
To test for any significant
difference in the number of hours
between breakdowns for four
machines, the following data
were obtained.
M1
6.6
8.1
5.5
7.7
Use the Bonferroni adjustment to 8.5
test for a significant difference
7.4
between all pairs of means.
Assume that a maximum overall experimentwise error rate of 0.05 is desired.
Find the value of LSD. (Round
1.9
your comparisonwise error rate
to three decimal places. Round
your answer to two decimal places.)
LSD =
M2
8.9
7.4
9.5
10.2
9.3
9.9
-
x₂ -
=
=
M 3
11.0
10.0
9.6
10.1
8.9
8.6
||
2.4
= 0.5
3.9
2
1.5
Which treatment means differ significantly? (Select all that apply.)
There is a significant difference between the means for Machine 1 and Machine 2.
There is a significant difference between the means for Machine 1 and Machine 3.
There is a significant difference between the means for Machine 1 and Machine 4.
There is a significant difference between the means for Machine 2 and Machine 3.
There is a significant difference between…
Which of the following is true about local control?
I. It employs the necessary practices or techniques to remove or minimize the effect of extraneous factors on the response of the experimental units.
II. It involves the repetition of the basic experiment to provide a valid estimate of the experimental error.
Chapter 13 Solutions
CENGAGENOW FOR ANDERSON/SWEENEY/WILLIAM
Ch. 13.2 - The following data are from a completely...Ch. 13.2 - In a completely randomized design, seven...Ch. 13.2 - Refer to exercise 2. a. what hypotheses are...Ch. 13.2 - In an experiment designed to test the output...Ch. 13.2 - In a completely randomized design, 12 experimental...Ch. 13.2 - Develop the analysis of variance computations for...Ch. 13.2 - Three different methods for assembling a product...Ch. 13.2 - Refer to the NCP data in Table 13.4. Set up the...Ch. 13.2 - To study the effect of temperature on yield in a...Ch. 13.2 - Auditors must make judgments about various aspects...
Ch. 13.2 - Four different paints are advertised as having the...Ch. 13.2 - The Consumer Reports Restaurant Customer...Ch. 13.3 - The following data arc from a completely...Ch. 13.3 - The following data are from a completely...Ch. 13.3 - To test whether the mean time needed to mix a...Ch. 13.3 - Refer to exercise 15. Use Fishers LSD procedure to...Ch. 13.3 - The following data are from an experiment designed...Ch. 13.3 - To lest for any significant difference in the...Ch. 13.3 - Refer to exercise 18. Use the Bonferroni...Ch. 13.3 - The International League of Triple-A minor league...Ch. 13.4 - Consider the experimental results for the...Ch. 13.4 - The following data were obtained for a randomized...Ch. 13.4 - An experiment has been conducted for four...Ch. 13.4 - An automobile dealer conducted a test to determine...Ch. 13.4 - The price drivers pay for gasoline often varies a...Ch. 13.4 - The Scholastic Aptitude Test (SAT) contains three...Ch. 13.4 - A study reported in the Journal of the American...Ch. 13.5 - A factorial experiment involving two levels of...Ch. 13.5 - The calculations for a factorial experiment...Ch. 13.5 - A mail-order catalog firm designed a factorial...Ch. 13.5 - An amusement park studied methods for decreasing...Ch. 13.5 - As part of a study designed to compare hybrid and...Ch. 13.5 - A study reported in The Accounting Review examined...Ch. 13 - In a completely randomized experimental design,...Ch. 13 - A study reported in the Journal of Small Business...Ch. 13 - The U.S. Environmental Protection Agency (EPA)...Ch. 13 - The following data show the percentage of 17- to...Ch. 13 - Prob. 38SECh. 13 - In a study conducted to investigate browsing...Ch. 13 - A research firm tests the miles-per-gallon...Ch. 13 - The compact car market in the United States is...Ch. 13 - Prob. 42SECh. 13 - A factorial experiment was designed to test for...Ch. 13 - A manufacturing company designed a factorial...Ch. 13 - Wentworth Medical Center As part of a long-term...Ch. 13 - Compensation for Sales Professionals Suppose that...
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