18166315
Description
Quiz by Katie Morbey, updated more than 1 year ago
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Created by Katie Morbey
almost 5 years ago
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Question 1
Question
Which of the following are sources of variance?
Answer
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The within group differences
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The error
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The treatment
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All of the these
Question 2
Question
Why would you use post-hoc tests instead of planned contrasts?
Answer
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We are 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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We are not interested in testing all possible comparisons
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There are not that many comparisons to make
Question 3
Question
How can you improve the power of your experiment?
Answer
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Reducing the degrees of freedom for the residual source of variance
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Increasing the number of levels of treatment
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Increasing the number of participants
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All of these
Question 4
Question
The power of a test is the probability of...
Answer
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accepting the alternative hypothesis when incorrect
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rejecting the null hypothesis when incorrect
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accepting the null hypothesis when correct
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rejecting the alternative hypothesis when incorrect
Question 5
Question
Imagine that 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 intervention. If you want to maximize the power of the study, which groups would you use?
Answer
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two groups: 1) immediately after the stroke 2) three weeks later
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two groups: 1) three weeks later 2) six months later
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two groups: 1) immediately after stroke 2) six months later
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three groups: 1) immediately after the stroke 2) three weeks later 3) 6 months later
Question 6
Question
If you take steps to minimize a Type I error, then the probability of making a Type II error is
Answer
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Cut in half
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Unaffected
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Increased
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Also decreased
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