Statistics Chapter 11 Exam Questions with Verified Solutions Rated 100%
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Statistics Chapter 11
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Statistics Chapter 11
Statistics Chapter 11 Exam Questions with Verified Solutions Rated 100%
The degrees of freedom for error is called ______.
a. degrees of freedom error
b. degrees of freedom denominator
c. degrees of freedom within-groups
d. all of these - Answers d. all of these
A researcher compares di...
Statistics Chapter 11 Exam Questions with Verified Solutions Rated 100%
The degrees of freedom for error is called ______.
a. degrees of freedom error
b. degrees of freedom denominator
c. degrees of freedom within-groups
d. all of these - Answers d. all of these
A researcher compares differences in positivity between participants in a low-, middle-, or upper middle-
class family. If she observes 15 participants in each group, then what are the degrees of freedom for the
one-way between-subjects ANOVA?
a. (2, 42)
b. (3, 12)
c. (2, 12)
d. (3, 43) - Answers a. (2, 42)
A researcher observed the mating behavior of 10 porpoises in 5 different social conditions. What are the
degrees of freedom between-groups for a one-way within-subjects ANOVA?
a. There is not enough information to answer this question.
b. 4
c. 9
d. 27 - Answers b. 4
Computing a one-way within-subjects ANOVA is appropriate when ______.
a. different participants are assigned to each group
b. the same participants are observed across groups
,c. the levels of one or more independent variables are manipulated
d. all of these - Answers b. the same participants are observed across groups
A researcher conducts a study using the one-way between-subjects ANOVA. He computes mc059-1.jpg =
120 and mc059-2.jpg = 200. What is the effect size for this test using eta-squared?
a. .38
b. There is not enough information to answer this question.
c. 1.67
d. .60 - Answers a. .38
Using a between-subjects ANOVA design, ______.
a. the same participants are observed in each group
b. data are not analyzed between groups
c. n participants are observed k times
d. n · k participants are each observed one time - Answers d. n · k participants are each observed one
time
Post hoc tests are computed ______.
a. following a significant ANOVA test to make pairwise comparisons
b. to determine which set of degrees of freedom can be attributed to the variability between-groups
c. to determine if groups means differ, even for tests in which the decision is to retain the null
hypothesis
d. prior to conducting a hypothesis test - Answers a. following a significant ANOVA test to make pairwise
comparisons
Which of the following is a measure of proportion of variance for a one-way between-subjects ANOVA?
a. omega-squared
, b. both A and B
c. eta-squared
d. estimated Cohen's d - Answers b. both A and B
The following result is reported for a one-way within-subjects ANOVA: F(2, 27) = 3.20, p < .05 (mc069-
1.jpg = .14). Which value in the summary suggests that the design was within-subjects?
a. the test statistic value
b. the p value
c. the partial estimate for eta-squared
d. the degrees of freedom - Answers c. the partial estimate for eta-squared
The following is a summary of a one-way between-subjects ANOVA: F(2, 37) = 3.42, p < .05, mc067-1.jpg
= .12. How many pairwise comparisons need to be made for this ANOVA result?
a. 12
b. 2
c. 4
d. 3 - Answers d. 3
In a study with 4 groups and 10 participants in each group, the sum of squares for the between-groups
source of variation is 60. What is the value for the mean square between-groups in this study?
a. 10
b. 20
c. 1.67
d. 15 - Answers b. 20
Which of the following is an assumption for computing a one-way within-subjects ANOVA?
a. The population being sampled from is positively skewed.
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