Sampling and Bias Flashcard

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What is stratified sampling?

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A method of sampling where the population is divided into subgroups, or strata, and then samples are randomly selected from each stratum.

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What is Voluntary Response Bias?

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A bias that occurs when individuals select themselves to participate in a survey, often leading to an overrepresentation of those with strong opinions.

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What is simple random sampling?

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Randomly selecting individuals from a population to form a sample.

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What is the main advantage of stratified sampling?

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It ensures that the sample is representative of the population when the population is diverse.

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What is Response Bias?

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A tendency for participants to provide inaccurate or misleading responses due to various influences.

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What is Non-Response Bias?

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

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What is Undercoverage Bias?

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A bias that occurs when some members of the population are inadequately represented in the sample.

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What is the purpose of sampling in research?

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To gather data from a subset of a population to make inferences about the entire population.

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What is the difference between qualitative and quantitative data?

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Qualitative data describes characteristics or qualities, while quantitative data involves numerical measurements.

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What is the importance of sample size in research?

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A larger sample size generally leads to more reliable and valid results, reducing sampling error.