17707415
Beschreibung
Quiz von Brage Haavik, aktualisiert more than 1 year ago
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Erstellt von Brage Haavik
vor mehr als 5 Jahre
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Frage 1
Frage
Which of the following are sources of variance?
Antworten
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The error
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The variance
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The treatment
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All of the above
Frage 2
Frage
Why would you use post-hoc tests instead of planned contrasts?
Antworten
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We are interested in testing all possible comparisons
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We are not interested in testing all possible comparisons
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There is a need to improve the power of the test
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There are not many comparisons to make
Frage 3
Frage
How can you improve the power of your experiment?
Antworten
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Increase the number of participants
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Reducing the degrees of freedom for the residual source of variance
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All of these
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Increasing the number of levels of treatment
Frage 4
Frage
Examine the following table, how many follow-up comparisons would you have to make if you choose a post-hoc style of testing?
Antworten
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3
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2
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4
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5
Frage 5
Frage
Examine the followng ANOVA SPSS output. If you ran post-hoc tests using Bonferroni correction, what level of alpha should you use per comparison?
Antworten
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0.005
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0.05
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0.01
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0.001
Frage 6
Frage
In the following study, the researcher ran a series of post-hoc tests using LSD. What was the alpha-value per comparison?
Antworten
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0.30
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0.05
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0.15
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0.01
Frage 7
Frage
The power of a test is the probability of...
Antworten
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Rejecting the null hypothesis when it is incorrect
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Accepting the null hypothesis when correct
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Accepting the alternative hypothesis when incorrect
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Rejecting the alternative hypothesis when incorrect
Frage 8
Frage
Imagine you are a Clinical Neuropsychologist who works with language difficulties shown by aphasics resulting from a brain stroke. You are interested in studying the impact of a particular treatment as a function of the time interval between the time of the lesion and the time of the intervention. If you want to maximize the power of your study, which groups would you use?
Antworten
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Three groups: 1)Immediately after the stroke, 2) three weeks later, 3) six months later
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Two groups: 1)Immediately after the stroke, 2) six months later
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Two groups: 1) three weeks later, 2) six months later
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Two groups: 1)Immediately after the stroke, 2) three weeks later
Frage 9
Frage
Examine the following graph, if you wanted to demonstrate the the 9th grade students gave higher food ratings than the older ones, which contrast coefficients would you use?
Antworten
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3 -2 -1 0
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2 -1 -1 0
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3 -1 -1 -1
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2 1 0 -3
Frage 10
Frage
If you take steps to minimize Type 1 error, then the probability of making a Type 2 error is
Antworten
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Cut in half
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Increased
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Decreased
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Unaffected
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