Surveys (vs) Experiments

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What is the main difference between surveys and experiments?

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Surveys collect data through questionnaires or interviews, while experiments manipulate variables to observe effects.

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Define 'Population' in the context of surveys and experiments.

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Population refers to the entire group of individuals or instances about whom we hope to learn.

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What is a sample in research?

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A sample is a subset of the population selected for participation in a study.

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What is stratified sampling?

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Stratified sampling involves dividing the population into subgroups and randomly selecting samples from each subgroup.

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What is cluster sampling?

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Cluster sampling involves dividing the population into clusters (often geographically) and randomly selecting entire clusters for the study.

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What does biased sampling mean?

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Biased sampling occurs when certain members of the population are more likely to be selected than others, leading to skewed results.

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What is an observational study?

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An observational study is a type of research where the researcher observes and records behavior without manipulating any variables.

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What is an experimental study?

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An experimental study involves manipulating one or more variables to determine their effect on a dependent variable.

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What is the purpose of random assignment in experiments?

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Random assignment helps ensure that each participant has an equal chance of being assigned to any group, reducing bias.

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What is a control group?

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A control group is a group in an experiment that does not receive the treatment or intervention, used for comparison.