
PAL PSYU3349 Week 10
Authored by Diana Babajanyan
Mathematics, Science, Other
Professional Development
Used 8+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Paired and unpaired t-tests involve what type of ratio?
Variance ratio
Noise : signal ratio
Signal : noise ratio
Odds ratio
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is a purpose of random allocation?
Ensure generalisation is possible
Distribute confounding variables between groups
Minimise carry-over effects
Minimise participant bias
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A larger Cohen's D for an un-paired t-test indicates what?
Less overlap in scores between groups
Greater overlap in scores between groups
Greater likelihood of normally distributed means
A weaker effect
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What can we do to counteract carry-over/order effects in a within-subjects design?
Random allocation to groups
Random sampling
Increase sample size
Counterbalancing
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following does not increase the signal : noise ratio for an unpaired t-test?
Decreasing within-group variation
Increasing SD of differences
Increasing sample size
Increasing difference between group means
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why shouldn't we use an unpaired t-test for within-subjects designs?
Because the assumption of "independence between and within groups" would be violated
Because the assumption of "normal distribution of within-subjects difference" would be violated
Because of increased variance due to individual differences
All of the above
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How do we calculate the F-statistic for a main effect in a between-subjects ANOVA?
F = meandifference / SEdifference
F = SSgroup / dfgroup
F = SSgroup/ SSerror
F = MSgroup / MSerror
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