Sampling & Bias

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What is Sampling?

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Sampling is the process of selecting a subset of individuals from a larger population to estimate characteristics of the whole population.

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What is a Sample?

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A sample is a part of the group we are interested in gathering data on that is being surveyed.

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What is a Population?

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A population is the entire group of individuals or objects that we want to learn about.

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What is Voluntary Response Bias?

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Voluntary Response Bias occurs when individuals select themselves to be part of a survey, often leading to unrepresentative results.

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What is Nonresponse Bias?

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Nonresponse Bias occurs when a significant number of people chosen for a survey do not respond, which can skew the results.

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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.

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What is a Random Sample?

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A random sample is a sample in which each individual or object in the entire population has an equal chance of being selected.

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What is a Survey?

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A survey is a method of collecting data by asking questions to a group of people.

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What is a Bias in Sampling?

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Bias in sampling refers to systematic errors that lead to an unrepresentative sample.

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What is a Stratified Sample?

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A stratified sample is a sampling method where the population is divided into subgroups, and samples are taken from each subgroup.