Data Collection & Experimental Design

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What is the explanatory variable in an experiment?

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The explanatory variable is the factor that is manipulated or changed in an experiment to observe its effect on the response variable.

Tags

CCSS.HSS.IC.B.3

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What type of sampling involves assigning numbers to subjects and selecting them randomly?

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This is known as simple random sampling.

Tags

CCSS.HSS.IC.B.3

Front

What is a control group in an experiment?

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The control group is the group that is not exposed to the treatment and serves as a comparison for evaluating the effect of the treatment.

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What are the principles of a well-designed study?

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The principles include randomization, replication, and control.

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What type of sampling involves selecting entire groups or clusters?

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This is known as cluster sampling.

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What is the response variable in an experiment?

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The response variable is the outcome that is measured to see if it is affected by the explanatory variable.

Tags

CCSS.HSS.IC.B.3

Front

What is the purpose of randomization in experimental design?

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Randomization helps to eliminate bias and ensures that the treatment groups are comparable.

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What is replication in the context of experimental design?

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Replication refers to repeating the experiment multiple times to ensure that the results are consistent and reliable.

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What is the difference between observational studies and experiments?

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Observational studies involve observing subjects without manipulation, while experiments involve manipulating one or more variables to determine their effect.

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What is a sample in research?

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A sample is a subset of a population that is selected for the purpose of conducting a study.