P&S| R1 Practice Interim

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What is a blocking design in experiments?

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A blocking design is an experimental design that involves dividing subjects into groups (blocks) based on a certain characteristic (e.g., gender) to reduce variability in the results.

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What is nonresponse bias?

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Nonresponse bias occurs when individuals selected for a sample cannot be contacted or refuse to participate, leading to a potential distortion of the results.

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In an experiment, what is a response variable?

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A response variable is the outcome that is measured in an experiment, which is affected by the independent variable.

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What is voluntary response bias?

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Voluntary response bias occurs when individuals choose to participate in a survey or study, often leading to a sample that is not representative of the population.

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What is a census in data collection?

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A census is a method of data collection that involves gathering information from every member of a population.

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What is a simple random sample?

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A simple random sample is a sampling method where every individual in the population has an equal chance of being 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 cluster random sample?

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A cluster random sample is a sampling method where the population is divided into clusters, and entire clusters are randomly selected for the sample.

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What is a stratified random sample?

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

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What is the purpose of random assignment in experiments?

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Random assignment is used to ensure that each participant has an equal chance of being assigned to any group, helping to eliminate bias.