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Discovering Statistics

Statistics

Quiz 13 :

Analysis of Covariance

Quiz 13 :

Analysis of Covariance

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A covariate is?
Free
Multiple Choice
Answer:

Answer:

C

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How many simple assumptions of ANCOVA exist?
Free
Multiple Choice
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Answer:

D

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ANCOVA can be used?
Free
Multiple Choice
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Answer:

A

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Convenience sampling sometimes causes undercoverage bias.
True False
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If observations are not randomly sampled and independent of one another,what happens in ANCOVA?
Multiple Choice
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A research fellow is conducting an experiment to test a hypothesis.Doubling the sample size will increase the power of the hypothesis test.
True False
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Increasing survey size does not affect survey bias.
True False
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Convenience sampling protects against undercoverage bias.
True False
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Which of the following is true?
Multiple Choice
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Analysis of covariance can be used to adjust for pre-existing differences in intact groups.
True False
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In hypothesis testing,the p-value is greater than the significance level.
True False
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In experimentally designed research,each experimental factor has one treatment level.
True False
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Doubling the sample size will increase the effect size of the hypothesis test.
True False
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Doubling the sample size will increase the probability of making a Type II error.
True False
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Postal surveys are susceptible to non-response bias.
True False
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It is not possible to use ANCOVA to increase statistical power,only decrease it.
True False
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By randomly assigning subjects to treatment levels,randomization spreads potential effects of lurking variables roughly evenly across treatment levels.
True False
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With experimental designs,blinding ensures that subjects in control and treatment conditions experience the placebo effect,but does not guard against confounding.
True False
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In ANCOVA there should be one covariate fewer than the number of independent variables.
True False
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Random sampling is a good way to protect against voluntary response bias.
True False
Answer:
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