Problem-Solving and Data AnalysisMediumScaling a sample proportion to a population
Problem-Solving and Data Analysis practice question
In a random sample of 200 voters from a town of 5,000 voters, 110 said they support a new park. Based on the sample, about how many of the town's voters support the park?
Answer: 2750
110/200 = 0.55, and 0.55 × 5,000 = 2,750.
Common wrong answers
- If you answered 110
- 110 is the count in the sample, not the town.
- If you answered 2500
- 2500 uses 50% instead of 55%.
- If you answered 5500
- 5500 doubles 2,750.
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