Quiz Over 1st Half of
Chapter 13 (pp. 276292) of the
6^{th} Edition
TwoWay Analyses of Variance
(NOTE: A different quiz covers pages 292310 of Chapter 13.)
Introduction
 (T/F) Whereas a oneway ANOVA has 1 independent variable, a twoway
ANOVA has 2 independent variables.
 A twoway ANOVA is ______ (univariate/multivariate) in nature.
Similarities Between OneWay and TwoWay ANOVAs
 Like a oneway ANOVA, a twoway analysis of variance focuses on ______
(means/variances).
 (T/F) Like a oneway ANOVA, inferences in a twoway ANOVA move from
the population to the sample.
The "Structure" of a TwoWay ANOVA: Factors, Levels, and Cells
 (T/F) In a twoway, there will always be 2 factors.
 The constituent parts of a factor are called _____ .
 How many factors are there in a 3x5 ANOVA? How many levels? How many
cells?
 (T/F) There will always be an even number of cells in a twoway ANOVA.
 A twoway ANOVA must have a minimum of how many cells?
The "Structure" of TwoWay ANOVAs: Active & Assigned Factors; the Formation
of Groups
 If used as an independent variable in a twoway ANOVA, which of these
would be an "active" factor:
 Gender
 Marital status
 Hair color
 In Excerpt 13.5, both factors were ____ (active/assigned).
 (T/F) A twoway ANOVA's research participants can be randomly assigned
to cells only if both factors are active.
The "Structure" of TwoWay ANOVAs: BetweenSubjects and WithinSubjects
Factors
 Any factor in a twoway ANOVA will be either a "betweensubjects"
factor or a(n) "______" factor.
 (T/F) If a factor is "betweensubjects" in nature, research participants
will be measured under (i.e., exposed to) all levels of the factor.
 (T/F) An assigned factor will necessarily be "betweensubjects" in
nature.
The "Structure" of TwoWay ANOVAs: Samples and Populations
 How many samples were in Excerpt 13.6's study?
 The number of populations in a twoway ANOVA corresponds with the
number of ____.
 If both factors of a twoway ANOVA are assigned, the study's populations
___ (must/might/can't) be tangible in nature.
 If one or both factors of a twoway ANOVA are active, the twoway
ANOVA's populations will be ____ (abstract/tangible) in nature.
Three Research Questions
 In a twoway ANOVA, how many research questions involve main effects?
How many involve interactions?
 In the study associated with Excerpt 13.4, how many main effect means are there
for Occupational Status?
 If 10 research participants are randomly assigned to each of the
cells of a 3x3 ANOVA, each main effect mean will be based upon the
scores
of
how
many
participants?
 (T/F) If all cell means are identical, it follows that all of the
main effect means will be identical too.
 (T/F) The research question dealing with interaction is concerned
with cell means, not main effect means.
 Is it possible to make up 4 imaginary and different sample means, put them
into the cells of a 2x2 ANOVA, and have absolutely no interaction?
 If the 2 factors are called A and B, is the AxB interaction the same
thing as the BxA interaction?
The Three Null Hypotheses (and the Three Alternative Hypotheses)
 Using symbols, show what the null hypothesis was for the main effect
of gender in Excerpt 13.5.
 In Excerpt 13.7, how many ms would appear
in the main effect null hypothesis for anxiety level?
 What would the subsript "labels" be for the population means referred
to by the previous question?
 (T/F) If both main effect null hypotheses are false, the interaction
null hypothesis must also be false too.
 In the righthand picture at the top of page 289, if the m
in the lower righthand cell had been equal to 20 (rather than equal
to 0), which of the 3 null hypotheses would be false?
 The alternative hypothesis for the main effect of "rows" says that
___ (all/at least 2) row ms differ.
Presentation of Results: Results From the TwoWay ANOVA Study on Identifying
States
 Whereas a oneway ANOVA leads to 1 Fratio, a twoway ANOVA leads
to __ Fratios.
 (T/F) The labels for the columns in oneway and twoway ANOVA summary
tables are the same.
 The main effect rows are usually located near the ___ (top/bottom)
of the twoway ANOVA summary table.
 The information in Table 13.1 shows a(n) _________ (direct/inverse) relationship
between the size of F and the size of p.
Presentation of Results: Results from Various TwoWay ANOVA Studies
 In Excerpt 13.8, which 2 numbers in the table were used to compute the
Fvalue for MEF?
 In Excerpt 13.9, the 2 computed means are _______ (main effect/cell) means.
 If the summary table for a 3x4 ANOVA indicates that dferror
= 108 , how many research participants were measured?
 (T/F) If all of the scores supplied by the research participants
are negative, the twoway ANOVA's df numbers will also turn out to be negative.
 In Excerpt 13.8, if the top df number had been 3 (rather
than 1), the 3rd df
value would have been ___ (rather than 2).
 (T/F) The results of Excerpt 13.8 illustrate the fact that if the interaction
in a twoway ANOVA turns out significant, then both main effects also
will be significant.
Click here for answers.
NOTE: Questions dealing with
the 2nd half of Chapter 13 appear on a separate quiz.
