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A hypothesis states that more exercise increases pulse rate. Which experimental plan is the fairest?

Answer and explanation

Correct answer: Measure the same person's pulse at rest and after fixed durations of exercise

Using the same person and measurement method reduces other differences. In exams choose comparable conditions.

Related tags

Fair TestPulse RateExerciseControlled VariablesHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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