Exam (elaborations)
D&AII Exam 2.
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- ARRT CI Exam Study Guide
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- ARRT CI Exam Study Guide
Exam of 7 pages for the course ARRT CI Exam Study Guide at ARRT CI Exam Study Guide (D&AII Exam 2.)
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D&AII Exam 2A key advantage of random assignment is that it makes ________ about the same in
each group. - ANS-Individual differences of participants
A lowercase k is used to denote - ANS-The number of groups in a study, the number of
levels of the factor in a study
A post hoc test is used: - ANS-Following a significant ANOVA, to determine which pairs
of group means were significantly different, to evaluate all pairwise comparisons, all of
the above
A procedure in which the order that participants receive different treatments or
participate in different groups is balanced or offset in an experiment, is called: -
ANS-Counterbalancing
A professor compares the exam grades of students based on whether they have a
learning disability (yes, no) and where they sit in the classroom (in the front, middle, or
back row). Different participants were observed in each group. What type of statistical
design is appropriate for this study? - ANS-Two way between subjects ANOVA
A researcher assigned participants (n = 8 per group) to read vignettes describing a
person engaging in either a helpful, hurtful, or neutral act. Different participants were
assigned to each group and asked to rate how positively they viewed the person
described in the vignette. What is the critical value for the one-way between-subjects
ANOVA at a .05 level of significance? - ANS-3.47
A researcher assigns participants to one of three groups (Group A, B, or C) and then
observes each group for two days (Days 1 and 2). What type of factorial design is most
appropriate for this study? - ANS-A mixed (1 between 1 within) factorial design
A researcher computes a 2 × 3 between-subjects ANOVA in which 6 participants are
observed in each cell. What are the degrees of freedom error for this study? - ANS-30
A researcher computes a 2 × 3 between-subjects ANOVA test in which 11 participants
were observed in each condition. If F = 5.17 for both main effect tests and the A × B
interaction test, then the decision for each test - ANS-Will be significant for both main
effects and the A X B interaction
, A researcher computes a 2 × 4 between-subjects ANOVA. What are the degrees of
freedom for Factor B for this study? - ANS-3
A researcher computes a 3 × 4 between-subjects ANOVA. What are the degrees of
freedom for Factor A for this study? - ANS-2
A researcher computes a 3 × 5 between-subjects ANOVA. What are the degrees of
freedom for the A × B interaction for this study? - ANS-8
A researcher computes the following one-way between-subjects ANOVA table. State
the decision at a .05 level of significance. (Hint: Complete the table first.)
Source. SS df ms F
BTG. 32. 4.
WIG(err. 45
TOT. 122 - ANS-Reject the null hypothesis
A researcher computes two 2 × 2 between-subjects ANOVAs. In Study 1, he observes 8
participants in each cell; in Study 2, he observes 12 participants in each cell. Which
study is associated with a larger value for degrees of freedom for the A × B interaction?
- ANS-Both studies have the same degrees of freedom for the A X B interaction
A researcher conducts a 2 × 4 between-subjects ANOVA in which 12 participants were
observed in each group. If SS Factor A = 18 and SS Error = 264, then what is the
decision for Factor A at a .05 level of significance using the two-way between-subjects
ANOVA? - ANS-Study 1
A researcher conducts a study in which k = 4 and n = 22 in each group. What are the
degrees of freedom for the one-way between-subjects ANOVA? - ANS-(3,84)
A researcher conducts a study in which k = 5 and N = 80. What are the degrees of
freedom between-groups for the one-way between-subjects ANOVA? - ANS-4
A researcher conducts a study in which k = 6 and n = 6 per group. What are the critical
values for the one-way between-subjects ANOVA at a .05 level of significance? -
ANS-2.53
A researcher conducts a study using the one-way between-subjects ANOVA. He
computes SS between = 120 and SS error = 200. What is the effect size for this test
using eta-squared? - ANS-0.38
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