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12 Cards in this Set

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What is the formula for Margin of Error?
1/ √ n

n = is always the sample size
Observational Study?
Observes individuals and measures variables of interest but does not attempt to influence the responses.
Experiment?
deliberately imposes some treatment on individuals in order to observe their responses.
Census?
A sample survey that attempts to include the entire population in the sample.
Convenience is?
A bad sampling method which means Choosing the people that are the easiest to reach.
Voluntary Response?
People choose to be in the study.(usually only strong negative opinions are stated here.)
Steps to a Confidence Statement?
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.
P = ?
P= Population Proportion
^
P = ?
^
p = Sample Proportion
Undercoverage?
occurs when some groups in the population are left out of the process of choosing the sample.
Non-response?
is the failure to obtain data from an individual selected for a sample.
Probability sample?
is a sample chosen by chance.