Types of Bias

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What is undercoverage bias?

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Undercoverage bias occurs when some members of the population are inadequately represented in the sample, leading to a skewed understanding of the overall population's opinions.

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What is voluntary response bias?

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Voluntary response bias happens when individuals select themselves to participate in a survey, often leading to an overrepresentation of strong opinions.

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What is response bias?

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Response bias refers to the tendency of respondents to answer questions inaccurately or falsely, often due to the wording of the question or social desirability.

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What is non-response bias?

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Non-response bias occurs when a significant number of people selected for the survey do not respond, which can lead to a biased sample.

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What is a sample in statistics?

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A sample is a smaller group selected from a larger population, used to make inferences about the population as a whole.

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What is a population in statistics?

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A population is the entire group of individuals or instances about whom we hope to learn.

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What is an unbiased question?

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An unbiased question is phrased in a neutral way that does not lead respondents toward a particular answer.

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What is a biased question?

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A biased question is phrased in a way that suggests a particular answer or influences the respondent's opinion.

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What is the importance of random sampling?

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Random sampling is crucial because it helps ensure that every member of the population has an equal chance of being selected, reducing bias.

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What is sampling error?

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Sampling error is the difference between the results obtained from a sample and the actual values in the population, often due to chance.