Good Sampling and Surveys Review

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What is Volunteer Response?

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A sampling method where individuals choose to participate in a survey or study, often leading to biased results because only those with strong opinions may respond.

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What is Convenience Sampling?

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A sampling method where individuals are selected based on their easy availability and accessibility, which can lead to biased results.

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What is Simple Random Sampling?

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A sampling method where every individual in the population has an equal chance of being selected, ensuring a representative sample.

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What is Systematic Random Sampling?

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A sampling method where individuals are selected at regular intervals from a randomly ordered list.

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What is Undercoverage?

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A source of bias that occurs when some groups in the population are left out of the selection process.

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What is Response Bias?

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A source of bias that occurs when respondents provide inaccurate answers due to misunderstanding, misinterpretation, or social desirability.

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What is Nonresponse Bias?

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A source of bias that occurs when individuals selected for the sample do not respond, potentially skewing the results.

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What is a Census?

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An attempt to collect data from every individual in the population, aiming for complete coverage.

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What is a Stratified Random Sample?

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A sampling method where the population is divided into subgroups (strata) and random samples are taken from each stratum.

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What is a Voluntary Response Sample?

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A sampling method where individuals self-select to participate, often leading to biased results.