Surveys, Experiments, and Observational Studies

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What is a sample group in an experiment?

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A sample group is a subset of the population that is selected for participation in an experiment.

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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 the difference between a survey and an observational study?

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A survey collects data through questions, while an observational study involves observing subjects without intervention.

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What is a randomized comparative experiment?

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A randomized comparative experiment is a study where participants are randomly assigned to different groups to compare outcomes.

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What does it mean to randomly choose participants for a study?

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Randomly choosing participants means selecting individuals in such a way that every member of the population has an equal chance of being included.

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

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A control group serves as a baseline to compare the effects of the treatment or intervention.

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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 the significance of measuring outcomes in an experiment?

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Measuring outcomes allows researchers to determine the effectiveness of the treatment or intervention being tested.

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What is a variable in the context of experiments?

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

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What is the role of hypothesis in an experiment?

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A hypothesis is a testable prediction about the relationship between two or more variables.