Sampling Methods and Types of Bias

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What is Sampling?

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

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Define Simple Random Sample.

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A Simple Random Sample is a sampling method where every individual has an equal chance of being selected.

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What is Systematic Sampling?

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Systematic Sampling involves selecting every nth individual from a list or sequence.

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Define Convenience Sampling.

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Convenience Sampling is a non-probability sampling method where samples are taken from a group that is easily accessible.

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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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Explain Voluntary Response Bias.

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Voluntary Response Bias occurs when individuals can choose whether to participate in a survey, often leading to a non-representative sample.

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What is Response Bias?

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Response Bias is the tendency of respondents to answer questions inaccurately or falsely.

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Define Non-Response Bias.

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Non-Response Bias occurs when individuals selected for the sample do not respond, leading to a potential skew in results.

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What is a Census?

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A Census is a method of data collection that involves gathering information from every member of the population.

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Identify the main characteristic of Stratified Random Sampling.

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Stratified Random Sampling involves dividing the population into subgroups (strata) and taking a random sample from each.