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12 Cards in this Set
- Front
- Back
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What is the formula for Margin of Error?
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1/ √ n
n = is always the sample size |
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Observational Study?
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Observes individuals and measures variables of interest but does not attempt to influence the responses.
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Experiment?
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deliberately imposes some treatment on individuals in order to observe their responses.
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Census?
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A sample survey that attempts to include the entire population in the sample.
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Convenience is?
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A bad sampling method which means Choosing the people that are the easiest to reach.
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Voluntary Response?
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People choose to be in the study.(usually only strong negative opinions are stated here.)
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Steps to a Confidence Statement?
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Confidence statement -
1.) State how confident 2.) Relate confidence statement to example (should be able to stand alone) 3.) Reference “ALL” of the population. 4.) State your interval. |
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P = ?
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P= Population Proportion
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^
P = ? |
^
p = Sample Proportion |
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Undercoverage?
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occurs when some groups in the population are left out of the process of choosing the sample.
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Non-response?
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is the failure to obtain data from an individual selected for a sample.
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Probability sample?
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is a sample chosen by chance.
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