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grade 12 · STAT2-006

Critique a statistical claim

Match the strength of a conclusion to sampling, assignment, measurement, and possible confounders.

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Students volunteer for a study of a new tutoring app, and app users later score higher. What is the strongest valid critique?

recruit→measure / assign→claim?Students volunteer for a study of a new tutoring app, and app users later score higher.

Choose an answerThe numerical result alone proves causation.A larger response always removes design bias.Self-selection may confound app use with motivation, so the result does not establish causation.The study is invalid because every sample must include the whole population.

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Math Lab is a working name for Ready Rung's separate math-learning product. Guided success and independent evidence are reported separately.