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A student used a different type of soil for each group in a plant growth experiment. What type of variable did soil become?

Answer and explanation

Correct answer: Additional confounding variable

Soil type may affect growth and obscure the effect of the main independent variable. In exams identify confounding variables.

Related tags

Confounding VariableSoil TypePlant GrowthExperimental DesignHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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