Anovas
In general what are the main 2 sources of variance
Model- MSm and Residual MSr
This test tests for normality and is more powerful of the two and can only be used with normal distributions
Shapiro Wilk
What is the difference between main effect and interaction
Main effect is the effect of one factor while ignoring the other
Interaction effectL how much does a factor rely on another
What is Indendent Vairbale (IV)
An IV is the variable that is being manipulated
True or false: in Repeated one way anova we care about the effect of subjects and subject level variability
False- we only care about the independent variable on the effect of subjects
This test see how much does each score deviate from the group mean and it is good for large sample sizes
Levene's test
Between type 1 error and type 2 error
Type 1 error: reject null hypothesis even when it's true
type 2 error: retain the null hypothesis when it is false
What is the familywise type 1 error?
the probability of making at least one Type I error in the family of tests if the null hypotheses are true
Name the three prior assumptions - 1 way anova
The population distribution of the DV is normal within each group, homogeneity of variance assumption,
Independence of observations
What should Epsilon be if Sphericity is violated?
Between 0 and 1
What is the difference between Post hoc tests and planned comparisons
Post hoc test is conducted after a significant F is found to understand further implications
Planned comparisons are designed before the data is collected and more specific
Effect size and name 1
magnitude of treatment effect, Cohen's D, Omega, eta squared
Suppose you had a graph with two lines, forming a perfect X. What main effects are there and is there an interaction effect?
There are no main effects and an interaction effect.
What test is used to deal with the violation of sphericity
Maulchy's W
What is the difference between orthogonal and non-orthogonal
An orthogonal planned comparison is independent and a non-orthogonal planned comparison is dependent
What is sphericity
The variance of differences of a pair of observations that is the same across all pairs
What do you need to include in apa format report?
1.1-2 sentence overview of analyses that includes the independent and dependent variable, stated conceptually.
2 Description of overall results of F -test, in a particular format. 3 Description of the pattern of mean differences among groups,
including whether significant differences were found.
4 A conceptual conclusion.
Name the two post hoc tests
Tukey's HSD, Sheffé's test, Tukey Kramer
What is the difference between dominated and dominates?
Dominated is when the main effect is above on every level
Dominates is when the interaction is above on 1 level
What is omega sqaured
The proportion in the Dependent variable that an be explained by the independent variables