APES Final Exam Review Experimental Design

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What is the importance of a large sample size and replication in scientific experimentation?

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A large sample size and replication are crucial for ensuring the reliability and validity of experimental results, allowing for better generalization of findings.

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What is a control group in an experiment?

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A control group is a baseline group that does not receive the experimental treatment, allowing for comparison against the treatment group.

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What does it mean to hold variables constant in an experiment?

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Holding variables constant means keeping all conditions the same except for the independent variable being tested, ensuring that any observed effects are due to the independent variable.

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What is the purpose of publishing scientific research?

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Publishing allows other scientists to review, replicate, and verify the results, contributing to the body of scientific knowledge.

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What is a hypothesis?

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A hypothesis is a tentative explanation for a phenomenon based on observations and research that can be tested through experimentation.

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What is an independent variable?

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

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What is a dependent variable?

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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 repeat experiments?

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Repeating experiments helps to confirm results and ensures that findings are consistent and not due to random chance.

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What is the significance of measuring the number of tumors in plants exposed to Agrobacterium?

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Measuring the number of tumors helps determine the relationship between exposure time to Agrobacterium and the likelihood of infection.

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What is the role of controls in an experiment?

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Controls help to eliminate alternative explanations for the results, ensuring that the observed effects are due to the independent variable.