Surveys, Experiments, and Observational Studies

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What is a survey?

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A survey is a method of collecting data by asking people questions to gather information about their opinions, behaviors, or characteristics.

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What is an experiment?

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An experiment is a study in which researchers manipulate one or more variables to determine their effect on a particular outcome.

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What is an observational study?

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An observational study is a research method where the researcher observes subjects in their natural environment without manipulation.

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What is a population in research?

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The population is 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 random sampling?

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Random sampling is a technique where each member of the population has an equal chance of being selected for the sample.

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What is a sample group?

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A sample group is the specific group of individuals selected from the population to participate in a study.

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What is the difference between a sample and a population?

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A population includes all members of a defined group, while a sample is a smaller group selected from that population.

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What is the purpose of a control group in an experiment?

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A control group is used as a benchmark to measure how the other tested subjects do, helping to isolate the effect of the treatment.

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What is a variable in an experiment?

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A variable is any factor, trait, or condition that can exist in differing amounts or types.