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Three measurements are taken at each value of the independent variable. What is the main benefit?

Answer and explanation

Correct answer: An average can be calculated to reduce the effect of random variation

The governing experimental principle is repetition and reliability. Taking three measurements at each independent-variable level allows the researcher to calculate a mean and notice unusually high or low readings. Averaging reduces the influence of random variation, so option B is correct. Repetition does not control the independent variable, remove the dependent variable, or guarantee identical results; those claims make A, C, and D incorrect.

Related tags

VariablesRepeated MeasurementsMeanReliabilityVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceScience

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