Sampling Methods and Types of Bias

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What is a Census?

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A Census is a method of data collection where information is gathered from every member of a population.

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What is a Simple Random Sample (SRS)?

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A Simple Random Sample is a sampling method where each member of the population has an equal chance of being selected.

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What is Stratified Sampling?

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Stratified Sampling is a method where the population is divided into subgroups (strata) and a random sample is taken from each stratum.

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What is Cluster Sampling?

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Cluster Sampling is a method where the population is divided into clusters, and entire clusters are randomly selected for the sample.

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What is Systematic Sampling?

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Systematic Sampling is a method where members of the population are selected at regular intervals.

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What is Convenience Sampling?

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

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What is Voluntary Response Sampling?

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Voluntary Response Sampling is a method where individuals choose to participate in the survey, often leading to bias.

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What is Bias in Sampling?

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

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Why is Random Selection Important in Sampling?

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Random selection is important to reduce bias and ensure that the sample is representative of the population.

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What is Nonresponse Bias?

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Nonresponse Bias occurs when individuals selected for the sample do not respond, potentially skewing results.