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Unformatted text preview: reject the null hypothesis of equal population means.
B. Reject the null hypothesis of equal population means.
C. Reject or fail to reject depending on the value of the t statistic.
D. Not be able to decide whether or not to reject the null hypothesis due to insufficient
information. AACSB: Analytic
Bloom's: Application
Difficulty: Easy
Learning Objective: 2
Topic: Oneway ANOVA 1986 Chapter 01  An Introduction to Business Statistics 44.
The Excel/MegaStat output given above summarizes the results of a oneway analysis of
variance in an attempt to compare the performance characteristics of four brands of vacuum
cleaners. The response variable is the amount of time it takes to clean a specific size room
with a specific amount of dirt.
At a significance level of .05, the null hypothesis for the ANOVA F test is rejected. Analysis
of the Tukey's simultaneous confidence intervals shows that at the significance level
(experimentwise) of .05 we would conclude that
A. all four brands of vacuum cleaners differ from each other in terms of their performance.
B. brand 1 differs from brand 2, and brand 2 differs from brand 3 while the rest of the vacuum
cleaner pairs do not differ from each other in terms of their performance.
C. brand 1 differs from brand 2, and brand 3 differs from brands 1, 2 and 4, while the rest of
the vacuum cleaner pairs do not differ from each other in terms of their performance.
D. only brand 3 differs from the other three brands (brands 1,2 and 3), while the rest of the
vacuum cleaner pairs do not differ from each other in terms of their performance.
E. none of the four brands of vacuum cleaners differ from each other in terms of their
performance. AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Hard
Learning Objective: 2
Topic: Oneway ANOVA 1987 Chapter 01  An Introduction to Business Statistics 45.
The Excel/MegaStat output given above summarizes the results of a oneway analysis of
variance in an attempt to compare the performance characteristics of four brands of vacuum
cleaners. The response variable is the amount of time it takes to clean a specific size room
with a specific amount of dirt.
What is the total number of observations for all brands of vacuum cleaners (total sample
size)?
A. 14
B. 17
C. 18
D. 19
E. 20 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 1988 Chapter 01  An Introduction to Business Statistics 46.
The Excel/MegaStat output given above summarizes the results of a oneway analysis of
variance in an attempt to compare the performance characteristics of four brands of vacuum
cleaners. The response variable is the amount of time it takes to clean a specific size room
with a specific amount of dirt.
Use the information above and determine an individual 95% confidence interval for
.
The mean and sample sizes for brand 1 and brand 2 are as follows:
n1 = 4 and n2 = 5.
A. .2013 to 1.1387
B. .2852 to 1.0547
C. .228 to 1.5680
D. .4515 to .8885
E. It cannot be determined with the information given. AACSB: Analytic
Bloom's: Application
Difficulty: Hard
Learning Objective: 2
Topic: Oneway ANOVA 1989 1 = 2.95, 2 = 2.28, Chapter 01  An Introduction to Business Statistics 47. Looking at four different diets, a researcher randomly assigned 20 equally overweight
women into each of the four diets. What are the degrees of freedom for the treatments?
A. 20
B. 4
C. 3
D. 19
E. 16 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 48. Looking at four different diets, a researcher randomly assigned 20 equally overweight
women into each of the four diets. What are the degrees of freedom for the error?
A. 20
B. 4
C. 3
D. 19
E. 16 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 49. Looking at four different diets, a researcher randomly assigned 20 equally overweight
women into each of the four diets. What are the degrees of freedom total?
A. 20
B. 4
C. 3
D. 19
E. 16 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 1990 Chapter 01  An Introduction to Business Statistics 50. Looking at four different diets, a researcher randomly assigned 20 equally overweight
women into each of the four diets. What are the degrees of freedom for the confidence
intervals?
A. 20
B. 4
C. 3
D. 19
E. 16 AACSB: Analytic
Bloom's: Application
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 51. _____ simultaneous confidence intervals test all of the pairwise differences between
means respectively while controlling the overall Type I error.
A. Randomized
B. Tukey's
C. Covariate
D. Interacting AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Objective: 2
Topic: Oneway ANOVA 52. _____ refers to applying a treatment to more than one experimental unit.
A. Randomization
B. Balanced experiment
C. Oneway ANOVA
D. Replication AACSB: Reflective Thinking
Bloom's: Comprehension
Difficulty: Medium
Learning Obje...
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 Winter '14

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