Experimental Design

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What is an independent variable in an experiment?

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The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable in an experiment?

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The dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

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Why is it important to have a control group in an experiment?

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A control group is important because it provides a baseline for comparison, helping to isolate the effects of the independent variable.

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What is the purpose of a hypothesis in scientific research?

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

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What does it mean to operationalize a variable?

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To operationalize a variable means to define it in measurable terms, allowing it to be tested in an experiment.

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What is the significance of randomization in experimental design?

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Randomization helps to eliminate bias by ensuring that each participant has an equal chance of being assigned to any group.

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What is a confounding variable?

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A confounding variable is an outside influence that can affect the results of an experiment, potentially leading to incorrect conclusions.

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What is the difference between qualitative and quantitative data?

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Qualitative data is descriptive and conceptual, while quantitative data is numerical and can be measured.

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What is the role of replication in experiments?

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Replication allows researchers to verify results by repeating the experiment under the same conditions.

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What is a variable in the context of an experiment?

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