Sampling and Bias Quick Review

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What is a Census?

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The process of gathering information/data from EACH member of the population.

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What is a Survey?

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The process of collecting information/data from a sample.

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What type of sampling design is used when taking an SRS of 25 students from each grade?

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Stratified sampling.

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What type of bias occurs when certain groups are not represented in a sample?

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Undercoverage bias.

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What is Convenience Sampling?

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A sampling method where the sample is taken from a group that is easily accessible.

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What is Simple Random Sampling (SRS)?

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A sampling method where every member of the population has an equal chance of being selected.

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What is Non-Response Bias?

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A bias that occurs when individuals selected for the sample do not respond.

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What is Voluntary Response Bias?

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A bias that occurs when individuals can choose whether to participate, often leading to overrepresentation of certain opinions.

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What is Cluster Sampling?

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A sampling method where the population is divided into clusters, and entire clusters are randomly selected.

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What is the purpose of Stratified Sampling?

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To ensure that specific subgroups within a population are adequately represented.