Sampling Methods

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What is Stratified Sampling?

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A sampling method where the population is divided into subgroups (strata) and random samples are taken from each strata.

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What is Systematic Sampling?

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A sampling method where every nth individual is selected from a list or queue.

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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 Random Sampling?

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A sampling method where every individual has an equal chance of being selected.

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What is Convenience Sampling?

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A sampling method where samples are taken from a group that is easily accessible.

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What is Biased Sampling?

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A sampling method that does not accurately represent the population, leading to skewed results.

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Example of Stratified Sampling.

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A market researcher selects 200 drivers under 35 and 100 drivers over 35.

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Example of Systematic Sampling.

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Every fifth person boarding a plane is searched.

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Example of Cluster Sampling.

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A researcher interviews all passengers on five randomly selected flights.

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Example of Random Sampling.

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Selecting names from a hat to choose participants.