Problem-Solving and Data AnalysisEasyWhy a tiny sample cannot support a claim about a town
Problem-Solving and Data Analysis practice question
Ella asked 10 of her friends whether they like pizza, and 8 said yes. She concludes that 80% of the people in her town like pizza. Which is the best reason her conclusion is not justified?
- A. Ten friends are too few, and not chosen at random from the town.Correct
- B. Pizza is not popular.
- C. She should have asked about pasta.
- D. 80% is not a possible percentage.
Answer: A. Ten friends are too few, and not chosen at random from the town.
A small group of friends does not represent a whole town.
Why the other answers are wrong
- B. Pizza is not popular.
- The survey says nothing about that.
- C. She should have asked about pasta.
- The topic is not the problem.
- D. 80% is not a possible percentage.
- 80% is a fine percentage; the sample is the problem.
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