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Question 1

For the following hypothesis, what is the independent variable (IV)? People who prefer rock music are more aggressive?

Ans- Listening to rock music.

Question 2

When participants tell future participants about the purpose of an experiment, this violates which assumption?

Ans- Independence of observation.

Question 3

Which of the following statements is true about skewness?

Ans- Skewnes in a distribution affects the means more so than median.

Question 4

You run a correlation between the number of hours someone spends playing videogames per week and performance on a mental rotation task. You receive the following results. What is the correct interpretation?r (80) = .31, p = .032.

Ans-There is a significant, positive correlation between number of hours playing videogames and performance on a mental rotation task.

Question 5

You get the following results when conducting a simple slopes analysis between a predictor and outcome variable at different levels of a moderator. What is the correct interpretation?For-1SD on the mediator:Slope = -1.33, t = -4.48, p < .001For +1SD on the mediator:Slope = .01, t = .02, p = .987

Ans-There is a significant negative association between the predictor and the outcome variables at -1SD on the mediator, but no association at +1SD on the mediator.

Question 6

You predict that the association between introversion and the number of words in someone's vocabulary can be explained by the number of books they read. In this relationship, which variable is the mediator?

Ans-Number of books read.

Question 7

Which of the following does NOT influence statistical power?

Ans-The number of statistical tests conducted.

Question 8

When path tracing a path diagram, which of the following rules is correct?

Ans-You can trace forward from one variable to another, but never forward and back.

Question 9

You wish to assess the relationship between time spent on social media (measured in minutes) and ratings of life satisfaction (score from 0 to 100). What is the appropriate statistical test?

Ans- Chi-square Test of Independence.

Question 10

You conduct an independent-samples t-test investigating whether people who are left-handed live longer than people who are right-handed. Below is the R output for this analysis.Which interpretation is correct?

Interpretation

Ans-Right-handed people (M = 69.68 years, SD = 12.60 years) live significantly longer than left-handed people (M-77.21, SD = 14.06 years), t(77.08)=-2.52, p = .014.

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