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Which experimental plan has the greatest chance of bias?

Answer and explanation

Correct answer: Selecting only data that support the hypothesis

Selecting only the data that support a hypothesis creates selection bias. The conclusion may then reflect the expected result rather than the actual evidence. Recording every result, using the same instrument, and repeating trials generally improve reliability. Exam tip: An unbiased experiment records results that both support and contradict the hypothesis.

Related tags

Selection BiasExperimental DesignHypothesis TestingData CollectionScientific MethodHypothesis And ExperimentationExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary Science

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