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What should be the same while comparing two groups?

Answer and explanation

Correct answer: Method of measurement

For a fair comparison, both groups must be measured using the same method. For example, temperature in both groups should be measured with the same type of thermometer and procedure. The independent variable is usually the factor changed for comparison, so it need not be the same. Exam tip: In comparison questions, check that the measurement method and units are consistent.

Related tags

Fair ComparisonMeasurement MethodExperimental VariablesData CollectionScience SkillsVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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