AP Stats: Sampling & Bias methods

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11 Terms

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census

selecting everyone from an entire population

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simple random sample (SRS)

where every individual has an equal chance of being selected

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stratified random sample

divide the population into groups (strata) and randomly select from each group

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systematic sample

selecting every ___nth individual

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cluster sample

split into groups and randomly choose one group

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convenience sample

picking the easiest group (closest)

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undercoverage bias

occurs when some members of the population are un-represented

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response bias

when some individuals answer untruthfully

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non-response bias

when some individuals are unwilling or unable to complete a survey

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voluntary response bias

when the survey relies on volunteers

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wording bias

when a question is worded in a way that it leads the participant to a certain answer