Sampling Methods & Bias

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What is random sampling?

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Random sampling is the method of selecting a sample from a larger population in such a way that every individual has an equal chance of being chosen.

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Why is random sampling important in statistical studies?

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It helps to ensure that the sample is representative of the population, allowing for more accurate and reliable results.

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What sampling method is used when names are drawn from a jar at a party?

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Random sampling.

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What is non-response bias?

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Non-response bias occurs when individuals selected for a survey do not respond, potentially skewing the results.

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What type of study is a student conducting when polling randomly-selected students about their music preferences?

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A sample survey.

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What is response bias?

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Response bias occurs when respondents answer questions inaccurately or falsely, often due to the wording of the questions.

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What is selection bias?

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Selection bias occurs when the sample is not representative of the population due to the method of selection.

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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 systematic sampling?

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

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What is cluster sampling?

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Cluster sampling involves dividing the population into clusters and then randomly selecting entire clusters for the sample.