Unit 4 Review: Collecting Data

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What is the placebo effect?

Back

The placebo effect describes the phenomenon where subjects in an experiment respond favorably to any treatment, even if it is inactive or a placebo.

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What is a random sample?

Back

A random sample is a sample that consists of individuals from the population who are selected using a chance process.

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What is sampling variability?

Back

Sampling variability refers to the fact that different random samples of the same size from the same population produce different estimates.

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What is undercoverage?

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Undercoverage occurs when some members of the population are less likely to be chosen or cannot be chosen in a sample.

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What is a control group?

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A control group is an experimental group whose primary purpose is to provide a baseline for comparing the effects of other treatments.

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What is bias in data collection?

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Bias refers to systematic errors that can lead to incorrect conclusions in data collection, often skewing results.

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What is response bias?

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Response bias occurs when participants provide inaccurate or false responses, often due to the way questions are asked.

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What is random assignment?

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Random assignment is the process of assigning participants to different groups in an experiment using randomization to ensure each participant has an equal chance of being placed in any group.

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What is a convenience sample?

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A convenience sample is a non-random sample that is taken from a group that is easily accessible, which may not represent the entire population.

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What is confounding in experiments?

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Confounding occurs when two or more variables are mixed together, making it difficult to determine the effect of each variable on the outcome.