Psyc 2402 Exam 2 Updated Actual Questions And Correct Answers

PSYC 2402 EXAM 2 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. factoral design
Answer:
a study with more than one factor

Question:
2. factoral notation
Answer:
tells you the number and the levels of factors ex) 2 x 2 => two factors each with 2 levels

Question:
3. main effect
Answer:
influence of a SINGLE FACTOR on the dependent variable, averaging across levels of other factors
(other factors are ignored)

Question:
4. how many main effects could you potentially have?
Answer:
the maximum number of main effect is equal to the number of factors

Question:
5. interaction
Answer:
the influence of one factor on the dependent variable depends on the level of one or more other factors

Question:
6. can the main effects tell you about interactions?
Answer:
no, the effects of factors are not simply additive

Question:
7. when there are main effects and interactions, which one is emphasized?
Answer:
when there are main effects and an interaction, main effects are deemphasized because and interaction
gives you more information

Question:
8. how many F values will you obtain when doing a 2-way ANOVA?
Answer:
3 2 main effects (one for each factor) and an interaction

Question:
9. practice finding main effects/interactions from the graphs on the slides

, Answer:
slides 9/28

Question:
10. why would we use 2-way ANO- VA as opposed to multiple regression?
Answer:
2-way ANOVA automatically tests for an interaction

Question:
11. when are you guaranteed to have two main effects and an interaction?
Answer:
when you have an outlier the outlier will increase the mean in the cell that it is in, leading to 2 main
effects and an interaction

Question:
12. what happens to error when you add a factor to you analysis that effects the dependent variable?
Answer:
it decreases, a higher percentage of variance will be accounted for by the factors in the model

Question:
13. two way between subjects ANOVA source table
Answer:
k = number of factor levels




Question:
14. SSfactorA
Answer:
(factor A level n)(factor A level mean - overall mean)^2 factor A level n = the number of scores in that
level of factor A

Question:
15. SSfactorB
Answer:
(factor B level n)(factor B level mean - overall mean)^2 factor B level n = the number of scores in that
level of factor B

Question:
16. SSAxB
Answer:
SStotal - SSfactor A - SSfactorB - SSerror

Question:
17. SSerror