AP Stats Sampling/Bias

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What is convenience sampling?

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Convenience sampling is a non-probability sampling method where the sample is taken from a group of people easy to reach, rather than a random sample.

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What is systematic sampling?

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Systematic sampling is a probability sampling method where you select every nth individual from a list or sequence.

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What is cluster sampling?

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Cluster sampling is a probability sampling method where the population is divided into clusters (groups), and entire clusters are randomly selected.

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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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What is a sample in statistics?

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A sample is a subset of individuals selected from a larger population, used to estimate characteristics of the whole population.

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What is the importance of random selection in sampling?

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Random selection helps ensure that every individual has an equal chance of being chosen, reducing bias and making the sample more representative.

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What is non-response bias?

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

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What is the difference between a population and a sample?

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A population includes all members of a specified group, while a sample is a subset of that population.

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What is stratified sampling?

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

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What is the role of sample size in statistical analysis?

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Sample size affects the reliability and validity of the results; larger samples generally provide more accurate estimates of the population.