Problem-Solving and Data AnalysisEasyWeakness of an advertisement's claim
Problem-Solving and Data Analysis practice question
An advertisement says that 9 out of 10 users of a diet product lost weight. The claim is based on 10 people chosen by the company. Which of the following is the best reason to doubt the claim?
- A. Ten people chosen by the company are a tiny, non-random sample.Correct
- B. Nine is not a large enough number to be a majority.
- C. Weight cannot be measured reliably.
- D. Diet products never work.
Answer: A. Ten people chosen by the company are a tiny, non-random sample.
Tiny, and hand-picked.
Why the other answers are wrong
- B. Nine is not a large enough number to be a majority.
- Nine of ten is a majority; the sample is the problem.
- C. Weight cannot be measured reliably.
- Weight can be measured.
- D. Diet products never work.
- A sweeping claim, not a reason.
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