Problem-Solving and Data AnalysisEasy–MediumWhy five friends cannot stand for everyone
Problem-Solving and Data Analysis practice question
A student asks five friends whether they prefer tea or coffee, and all five say tea. The student concludes that most people prefer tea. Which of the following is the best reason the conclusion is not justified?
- A. The sample is very small and was not chosen at random.Correct
- B. Tea is less popular than coffee.
- C. The student should have asked about juice.
- D. Five is an odd number.
Answer: A. The sample is very small and was not chosen at random.
Five friends are neither many nor random.
Why the other answers are wrong
- B. Tea is less popular than coffee.
- The conclusion's flaw is in the method, not in a competing fact.
- C. The student should have asked about juice.
- The drink asked about is not the problem.
- D. Five is an odd number.
- Irrelevant.
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