Exam (elaborations) Univariate 1 Tulane

,What is true about consistency among the three 2-way interaction definitions? -
CORRECT ANSWERS-a.If one of the definitions shows that the 2-way interaction is
present, then all other definitions will also show that the 2-way interaction is present

1.Define a 2-way interaction - CORRECT ANSWERS-a.The effect of one IV(A) on the
DV varies across levels of another IV (B)

Define a 3-way interaction - CORRECT ANSWERS-a.The simple two-way
interaction(the effect of one IV (A) on the DV varying across levels of another IV (B))
varies across the levels of a third IV (C)

1.What are the three questions you ask to determine if a 3-way interaction is present? -
CORRECT ANSWERS-a.Presence- Are 2-way interactions present in the two plots?


b.Direction- What are the directions of the 2-way interactions?


c.Magnitude- How large are the magnitudes of the 2-way interactions, in terms of the
angles between the lines in the interactions?

1.Explain the process of determining if a 3-way interaction is present using the
questions? - CORRECT ANSWERS-

1.What does Repeated Measures mean? - CORRECT ANSWERS-a.Each subject's DV
score is measured at every level of a repeated measures IV


b.Subjects are measured multiple times, for each IV condition/level

1.What does it mean if an experiment has factorial design? - CORRECT ANSWERS-
a.Each level of one variable is paired with each level of the other variable

1.What is another term for repeated measures ANOVA? - CORRECT ANSWERS-
a.One score per cell analysis

1.Define Carryover effects - CORRECT ANSWERS-a.The effects of earlier trials on the
DV scores obtained in later trials

1.What happens if the Sphericity assumption is violated in RM ANOVA? - CORRECT
ANSWERS-Type 1 error rate begins to rise

Why don't we know for sure the specific value of Box's Epsilon? - CORRECT
ANSWERS-a.There are multiple methods of computing Box's Epsilon that all produce
different values of Box's Epsilon, and there isn't a clear answer about which method is
the best one.

, 1.True or false: the same effects are tested in 2-way RM as are tested in 2-way BG? -
CORRECT ANSWERS-True

1.Define Split-Plot ("Mixed") ANOVA - CORRECT ANSWERS-a.2-way design with 1
repeated measures IV and 1 between groups IV


b.Subjects are divided into groups by 1 IV (i.e. sex) and are measured at every level of
another IV

1.What are the two types of Chi-Square (𝜒²) Analyses and what is the primary difference
between them? - CORRECT ANSWERS-a.𝜒² Goodness of Fit Test- Only used for just
one categorical variable


b.𝜒² Test of Independence -2 variables : categorical IV and categorical DV

What kind of data is analyzed using Chi-square analyses? - CORRECT ANSWERS-
a.Count data

1.What is the equation for 𝜒²? - CORRECT ANSWERS-a.𝜒² = Σ((O-E)²/E)

1.What do E and O stand for in the 𝜒² equation? - CORRECT ANSWERS-a.E =
expected count (expected value) for each category


b.O = observed count (observed value) for each category

1.What is the equation for E in the 𝜒² Goodness of Fit Test? - CORRECT ANSWERS-
a.Ei = 𝚷i x N


i.𝚷i = probability of i

How do you find the df for 𝜒²critical in the 𝜒² Goodness of Fit Test? - CORRECT
ANSWERS-a.𝜒²critical = 𝜒²(number of cells -1, α = .05)

What is the significance rule for the 𝜒² tests in the metric of the test statistic 𝜒²? -
CORRECT ANSWERS-If 𝜒²observed > 𝜒²critical, then it's significant and you can reject
the null hypothesis

What is the equation for odds for the 𝜒² tests? - CORRECT ANSWERS-ODDSi = 𝛑i / (1-
𝛑i)