AP Stat Chapter 4 Vocabulary Flashcard (TPS5e)

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groups of similar individuals in a sample

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strata

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Voluntary Response...

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individuals choose on their own to participate in the sample

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When two variables are associated so their effects cannot be separated

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confounding

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Systematically favoring certain outcomes

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bias

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n individuals chosen in such a way that each group of n has an equal chance of being the sample selected

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simple random sample

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Under coverage is

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when some groups in the population are left out of the process of choosing the sample

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Deliberately imposes some treatment on individuals to measure their response

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experiment

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What are the explanatory variables in an experiment?

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factors

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People used in an experiment

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subjects

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observes individuals and measures variables of interest only

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observational study